H3po4 boiling point. 29 Relative vapour density (air = 1): 3.

H3po4 boiling point Partition Coefficient. Separation of cyclohexene (boiling point \(83^{\circ}\)) from cyclohexanol (boiling point \(161^{\circ}\)) is simple because of the large difference in boiling points between the two liquids. Compare the boiling point of diethyl ether (35 °C)with that of Its isomer 1-butanol (117 °C). It is a strong mineral acid with excellent Study with Quizlet and memorise flashcards containing terms like Hydrogen bromide (HBr) could be used in the overall conversion of P into R, instead of using HCl Hydrogen bromide is made by the reaction of NaBr with concentrated phosphoric acid. 0 °F) at ca. , ≥99%; CAS Number: 7664-38-2; EC Number: 231-633-2; Synonyms: Orthophosphoric acid; Linear Formula: H3PO4 at Sigma-Aldrich Melting point/freezing point Melting point/range: 40 °C - lit. It has a boiling point of 212 °C and a melting point of 42. Phosphoric Acid 85% is a colorless, odorless, and viscous liquid with a strong acidic taste. 10m. 75, [4] and it can be used to prepare buffer solutions at that pH. The boiling point of a substance is the temperature at which the vapor pressure of a liquid equals the pressure surrounding the liquid [1] [2] and the liquid changes into a vapor. Study with Quizlet and memorise flashcards containing terms like this question is about the preparation of hexan-2-ol. It is a precursor to triazolylpinacolone in the synthesis of the fungicide triadimefon and in synthesis of the herbicide metribuzin. Allotropes of Phosphorus. 0 m glucose, C6H12O6 So, I did some research and found that the formula for finding change in boiling point = Tb = i Kb m m and Kb are all the same values, because they are all aqueous Boiling points are a measure of intermolecular forces. [5] and others. 00 Formula: H3PO4 Hazard Info: Corrosive, Toxic, Irritant Density (g/mL): >1. 700. 1992. Specific Gravity. 0 moles of ions in the solution, due to which the boiling point of solution increases three fold. 225 °F at 760 mmHg (NTP, 1992) National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). It introduces their chemical reactivity in a general way. Solution Phosphoric acid puriss. (The broken line represents the H3PO4 Lewis Structure: How to Draw the Lewis Structure for H3PO4. [6]Structure of sulfuric acid Boiling point. Note : Incompatible with strong bases and powdered metals. 00 Phosphoric acid (also known as orthophosphoric acid or phosphoric [V] acid) Molecular formula : H 3 PO 4 (O = 65,3 %, P = 31,64%, H = 3,06 %) Molar mass = 97,9952 ± 0,0014 g·mol-1 Phosphoric acid is a mineral (inorganic) acid . It is well known for its role in rust removal, metal cleaning, and fertilizer manufacturing. difference in electronegativity) of bonds. Initial boiling point and boiling range 158 °C - lit. 19m. It has a molar mass of 97. 680g/cm³: Heavy Metals (as Pb) 0. Learn. 5 mm2/s (20 °C) Dimensions; Materials Information; Toxicological Information; The boiling point elevation (\(ΔT_b\)) and freezing point depression (\(ΔT_f\)) of a solution are defined as the differences between the boiling and freezing points, respectively, of the solution and the pure solvent. Products Building Blocks Explorer Genes Papers Technical Documents Site Content Chromatograms point/freezing point Melting point: 41. 2 mm Hg ( 20 °C) Vapour density Answer to what is the boiling point of 85% H3PO4. p p p: Vous roulez à plus de 105 km/h. Formula Weight. Phosphorus occurs in at least 10 allotropic forms, the most common (and reactive) of which is so-called white (or yellow) phosphorus, which looks like a The boiling point of 85 wt% phosphoric acid has been stated as 158 ºC (atmospheric pressure) (*). 834g/cm3, melting Phosphoric acid (H3PO4) is a colorless, syrupy liquid that boils at 407°C (765°F). So 1. 5 mm2/s (20 °C) Dimensions; Materials Information; Toxicological Information; This page contains tables of azeotrope data for various binary and ternary mixtures of solvents. This will make the reverse reaction less likely. Water added to acid can cause uncontrolled boiling and splashing. 1998. 5&deg;F 40. Include lone pairs. Melting point/freezing point Melting point/range: 40 °C - lit. Trend #1: The relative strength of the four intermolecular forces . When the liquid reaches the boiling point, evaporation takes place with the entire volume. Water boiling at 99. Osmosis. Orthophosphoric acid is referred to as phosphoric acid, which is the IUPAC term for this compound. Question: Arrange the compounds from lowest boiling point to highest boiling point. Exercise 14. Boiling sulfuric acid at a concentration of 1% by weight had a corrosion rate of 2. 0285 mmHg at 20 °C Vapor density 3. S. Why is Na3PO4 described as a salt of H3PO4? [1] Welcome to Boiling Point, home of the original "Mini Wok on a Box". Colorless and odorless, it is soluble in water, diethyl ether, and ethyl alcohol. 001% max. This colorless, flammable liquid with a characteristic smell is mainly used as a solvent either directly or as its esters. 0 g of water has a freezing point of - 1. When diluting, the acid should always be added slowly to water and in small amounts. Protic vs Aprotic Solvents. 1 °F at 760 mmHg (NTP, 1992) National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 3 ∘ C ^{\circ} \mathrm{C} ∘ C. 5 °C 565. Similar questions. So the ordering in terms of strength of IMFs, and thus boiling points, is CH 3 CH 2 CH 3 < CH 3 OCH 3 < CH 3 CH 2 OH. 99 g/mol. 7 psia, 1 bar absolute) for some common fluids and gases can be found from the table below: Liquids and Gases - Boiling Points; Product Boiling Point at Atmospheric Pressure (o C) Acetaldehyde CH 3 CHO: 20. [7] With fluoride, the cluster [Ti 4 F 18] 2-forms. 0 m glucose, C6H12O6 Share Boiling point: 158 °C (1013 mbar) Density: 1. One of the advantages of using H 3 PO 4 for etching is the existence of specific equipment in order to maintain the water in the solution while heating it at high temperature. The dependence of the boiling point on the external pressure can often be very useful. The next hydride would be H 2 O (WATER!). 08: Acentonitrile: 81. Solubility in water. It is known that the boiling point of the solution increases as the concentration of H 3 PO 4 increases [9]. H2O>CH3OH 2. Quantity. 5 °C. 158 oC. 463. Classifying H3PO4. The intermolecular forces increase with increasing polarization (i. Eur. 0 m of it will form 3. ; If a strong acid such as H 2 SO 4 or p-TsOH is Moving up, the next hydride would be H 2 Se (hydrogen selenide) with a boiling point of -42°C. • Hg(CH 3) 2 • H 3 PO 4 Phosphoric acid, also known as orthophosphoric acid or phosphoric(V) acid, is a mineral (inorganic) acid having the chemical formula H 3 P O 4. Wiki User. Phosphorus is a nonmetal, solid at room temperature, and a poor conductor of heat and electricity. NH 3 + 3 C 2 H 5 OH → N(C 2 H 5) 3 + 3 H 2 O. 66: kJ/mol: Review: Chase, 1998: Data last reviewed in December, 1971: Quantity Value Units Method Reference Polyphosphoric acid (H 3 PO 4) is a colorless, odorless and highly viscous liquid compound with strong hydroscopic properties. 995182 = 0. Boiling Point. For this, click on the drop-down menu associated with the Substance field. Phosphoric acid was prepared first by Robert Boyle in 1694 by dissolving phosphorus Phosphoric acid (H3PO4) is a colorless, odorless mineral acid with a boiling point of 158°C at 1 atm pressure. 78-90° C. However, when treated with strong acid, R-OH is converted into R-OH 2 (+) and H 2 O is a much better leaving group. 3. Calculate the molar mass of the unknown compound. H 3 PO 4 is one of the ChemSpider record containing structure, synonyms, properties, vendors and database links for Phosphoric acid, 7664-38-2, 1921286 transparent colorless viscous solution, odorless. 71 g/cm3 (20 °C) Melting Point: 21 °C: pH value: 0. b) Vous roulez à plus de 65 milles à l'heure, mais vous n'obtenez pas de contravention Ans B) 1. 02382 ÷ 97. Your solution’s ready to go! Enhanced with AI, our expert help has broken down your problem into an easy-to-learn solution you can count on. Major Trends in Boiling Points of Chemical Elements. In a process developed in the 1980s, acidic phosphate solution (CaHPO4 in the presence of H3PO4) is treated with NaHSO4, whereby The boiling point of orthophosphoric acid is 158 acid hydrolysis than other polysaccharides as seen by the general integrity of the cell structure after reaction with H3PO4, even at elevated HTT. , ≥99%; CAS Number: 7664-38-2; EC Number: 231-633-2; Synonyms: Orthophosphoric acid; Linear Formula: H3PO4 at Sigma-Aldrich Question: Arrange the compounds from lowest boiling point to highest boiling point. CL00. Molecular Weight. The key factor for the boiling point trend in this case is size (toluene has one more carbon), whereas for the melting point trend, shape plays a much more important role. Quantity Value Units Method Reference Comment; Δ f H° liquid-1271. 4 (air=1) 75+% H3PO4 For laboratory use, Ph. 8 °C, and the boiling point of ethanol is 78. (H3PO4), the most essential phosphorus oxygen acid, was used to produce fertilizer phosphate salts. Learn more about its structure, properties, synthesis, uses Boiling Point: The boiling point of Phosphoric Acid is around 407° Celsius. 6 °C: Chemical Formula: H 3 PO 3: Phosphorous Acid Structure – H 3 PO 3. 66: kJ/mol: Review: Chase, 1998: Data last reviewed in December, 1971: Quantity Value Units Method Reference CAS Number: 8017-16-1 Linear Formula: Hn+2PnO3n+1 MDL No. The pK a of protonated triethylamine is 10. 0 m sulfuric acid, H2SO4 (C) 1. 0857%: Pt(NH3)4(PtCl4) NH3{-}NH3; AgNCS; NaBH3H; Cd(Cl2) (Cu(OAc)2)*H2O; Recently Calculated Molar Masses; Recently Balanced and for the rest, why don't you use the acid dissociation constants your book provides? Higher #K_a# = stronger acid. phosphoric acid Molecular Model Wet etching of Silicon nitride (Si3N4) by phosphoric acid (H3PO4) is one of the key steps in the semiconductor fabrication process, especially for three‐dimensional integrated circuits (ICs). Melting point 34-35 °C (when it contains the full 12 mols of H2O). After this point, the single extraction yield and Pyrophosphoric acid, also known as diphosphoric acid, is the inorganic compound with the formula H 4 P 2 O 7 or, more descriptively, [(HO) 2 P(O)] 2 O. Weight. characteristic. Nature : Phosphoric acid is a weak acid that is non-toxic and non-volatile. Copy. The solubility of TBP and its degradation products in uranyl nitrate hexahydrate melt decreases in the order H2MBP > HDBP > TBP > H3PO4. CAS 7664-38-2. Uses and Applications. Phosphorus occurs in at least 10 allotropic forms, the most common (and reactive) of which is so-called white (or yellow) phosphorus, which looks like a This optimization cannot be done independently, since the boiling point of phosphoric acid varies with the concentration, as show in Figure 3. Primary effects of acid attack are to hydrolyze glycosidic linkages in the hemicellulose and cellulose and to cleave aryl-ether bonds in the lignin. 06%. 1 °C, the boiling point of dimethylether is −24. 1&deg;C TEMPERATURE, TEMPERATURE,˚C between 158 °C (boiling point of an 85% phosphoric acid solution) and 165 °C. The boiling point is influenced by factors such as molecular weight, molecular size, and intermolecular forces. Hydrogen bonding plays important roles in determining physical properties of compounds and enabling key Soient p p p et q q q les propositions. It also allows for the formation of structures like DNA base pairs and protein secondary structures. 01\ \mathrm{M}$ show the highest elevation in boiling point and why?. Phosphoric acid is a weak, corrosive acid with the formula H3PO4. 7 °F at 983 hPa - OECD Test Guideline 103 g) Flash point ()Not applicable h) Evaporation rate No data available i) Flammability (solid, gas) The product is not flammable. The strength of the four main intermolecular forces (and therefore their impact on boiling points) is ionic > hydrogen bonding > dipole dipole > dispersion Boiling point increases with molecular weight, at the boiling point of cyclohexene. Product Overview. Density > 1. 12MoO3 xH20. One more up and you find that H 2 S (hydrogen sulfide) has a boiling point at -62°C. Agency. Format. 4 85+% H3PO4 For laboratory use, ACS, ISO, Ph. One example is the complex cis-TiF 4 (CH 3 CN) 2, which is formed by treatment with acetonitrile. Join / Login >> Class 11 >> Chemistry Water has Online calculator, figures and tables showing boiling points of water at pressures ranging from 14. 35 ° C, its boiling point is 158 ° C and its density is 2. It is a mixture of linear phosphoric acids and Phosphoric acid’s formula is written as H 3 PO 4. Phosphomolybdic Acid Hydrate – 500 g Pinacolone (3,3-dimethyl-2-butanone) is an important ketone in organic chemistry. 4 °C Boiling Point 212 °C Density 1. 135 °C (275 °F) Color. The increase in the boiling point of a solvent is a colligative property. ) Density: 2. The amount of sour agent used as a cola drink is 0. There are Pyrophosphoric acid, also known as diphosphoric acid, is the inorganic compound with the formula H 4 P 2 O 7 or, more descriptively, [(HO) 2 P(O)] 2 O. ACS. 7 to 3200 psia (1 to 220 bara). The compound is a component of polyphosphoric acid, an important The incorrect order of boiling point is- 1. However, its utility for drying is limited somewhat by its tendency to form a protective viscous coating that inhibits further dehydration by unspent material. 0 g of water?(a) Outline the s Store in rubber lined or 316 stainless steel designed for phosphoric acid. It is primarily available as an aqueous solution (approximately 85%), which is an odorless, colorless, and IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids. Government Printing Office. Molecular weight: The molecular weight of Phosphoric Acid is 97. Molar Weight 97. 3 kPa at 20°C Vapor density 3. 7 g/cm³ Solubility in water: very soluble Vapour pressure, kPa at 20°C: 0. H2SO4 is a strong acid that completely dissociates into water into protons and SO42- ions. CAS No 7664-38-2; Boiling point 407 C; Melting Point 42. 2. H3PO4: Boiling point: 158 AdegC: Structural Formula: Three Hydrogens, One Phosphorus Atom, and Four Oxygens: Molecular Weight: 97. A compound's boiling point is a physical constant just like melting point, and so can be used to support the identification of a compound. 0 m sulfuric acid H2SO4 because: Boiling point elevation is a colligative property of the solution that depends upon the molality of the solution . Lowest Boiling Phosphoric acid (H 3 PO 4) is a crucial and beneficial mineral acid. Find out its pKa values, buffering properties, and applications in food and industry. 1 Quantity Value Units Method Reference Comment; Δ f H° liquid-1271. with Boiling Point Elevation. So despite its small molecular weight, water has an incredibly The polarity increases attraction between the molecules, hence, both the boiling point and viscosity are high. 1 High Si 3N 4 removal rates and low SiO 2 removal rates are required for high-selectivity formulations based on phosphoric acid. Applications: Used as a hydrogen source, as a reducing agent and is used in tanning and dye fixing. Chemical properites. It has an adamantane-like Ti 4 F 6 core. 02% to 0. - Hg(CH3)2 (Dimethyl Mercury) has a higher boiling point than Ar and AsH3. : U. 89 g/cm³ 158 °C 42. You’ll be fascinated to learn about the classification of H3PO4. ) Color & Form. Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It also allows for the formation of structures like DNA base pairs and protein secondary Melting point 34-35 °C (when it contains the full 12 mols of H2O). Characteristics. 92 inches] of mercury). [8]Related to its Lewis acidity, TiF 4 forms 3. It is displaced to higher temperature while the acid concentrates by nearly evaporating just water. CH3N3>HN3 Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level The boiling point at atmospheric pressure (14. Boiling point: 158 °C (1013 mbar) Density: 1. Washington, D. In this case, the two isomers have different molecular structures, which would result in The given phosphoric acid H3PO4 is highly viscous and high boiling point due to the presence of hydrogen bonding in concentrated solution hence the answer is Option (4) “it has PO. Research Triangle Park, North Carolina. p. General Chemistry ? Get exam ready. In a process developed in the 1980s, acidic phosphate solution (CaHPO4 in the presence of H3PO4) is treated with NaHSO4, whereby Boiling point / °C ammonia: =NH3 - 33 fluorine =F2 - 188 bromine =Br2 59 Explain the different boiling points of NH3, F2 and Br2. Phosphorus occurs in at least 10 allotropic forms, the most common (and reactive) of which is so-called white (or yellow) phosphorus, which looks like a 3. Temperature given as °C, °F, K and °R. 3 Boiling Point 482 °F at 22 mmHg (sublimes) (NTP, 1992) National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 9 g of an unknown molecular (no nelectrolyte) compound in 150. 0 °F) BOILING POINT: 75% 135 °C (275 °F) 85% 158 °C (316 °F) FLASH POINT : Not Available FLAMMABILITY (SOLID, GAS): Not A pplicable UPPER/LOWER FLAMMABILITY OR Molweight, melting and boiling point, density, flash point and autoignition temperature, as well as number of carbon and hydrogen atoms in each molecule for 200 different hydrocarbons. Manufacturer. TiF 4 forms adducts with many ligands. 29 Relative vapour density (air = 1): 3. Alternatively, dilute solutions of hydrofluoric acid with low degree of ionization, at high temperatures, can deliver the high Si 3N 4/SiO Boiling Point versus Concentration . Which of the following solutions that have concentrations of $0. 00 Price. Reactions were performed at 100 °C–120 °C, and in spite of the formally A3 + B3 process The freezing points of standard concentrations are as follows: Acid Strength (% H3PO4) 75% 80% 85% Freezing Point 0. Markush Class. CAMEO Chemicals. Boiling Point (BP) 600 Dipotassium phosphate | K2HPO4 or HK2O4P | CID 24450 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological Assuming ideal solution behavior, what is the boiling point of a solution of 115. 4 Boiling Point. 5 mm/yr. Molecular Weight 98. NCH33<NHCH32 3. 1mm/year lines are represented for the 304 (light blue) and 316 (dark blue) types and show that the 304 types should be satisfactory up to acid’s boiling point to around 25% concentration. For the solvents included in the table, the distinguishing feature is the presence of an -OH group, and that is the most common characteristic of a protic solvent. Markush The wet etching of nitride films is often performed in concentrated hot orthophosphoric acid (H3PO4). $80. 994g/mol Melting Point 40–42. It is good practice to bring the vapours into contact with a cold surface and to drive the condensed liquid back into The pressure of gas above a liquid affects the boiling point. Flash point No data available; Evaporation rate No data available; Flammability (solid, gas) No data available; Upper/lower flammability or explosive limits No data available; Vapour pressure 2. Either vapor pressure, boiling point elevation, freezing point depression, or (most commonly) osmotic pressure is measured and the appropriate equation is used to calculate the concentration (molarity from osmotic pressure, molality from boiling MELTING/FREEZING POINT: 75% -17. Stop by and enjoy our delicious Taiwanese Hot Pot cuisine! Click here👆to get an answer to your question ️ Which of the following order of boiling point is correct? 1 H3PO4> H2SO4 2 H20 > H202 3 H20 > Sic 4 NH3 > HF. Phosphoric acid is a weak tribasic acid with the formula H3PO4. ; In the section below, State 1 (The normal boiling point), All About Elimination Reactions of Alcohols (With Acid) The hydroxyl group of alcohols is normally a poor leaving group. 158° C. It is due to Melting point/freezing point ~-17 °C (~1 °F) Initial boiling point and boiling range ~135 °C (~275 °F) Flash point Not Flammable Evaporation rate Not Available Flammability (solid, gas) Not Flammable Upper/lower flammability or explosive limit Not Explosive Vapor pressure 0. Application. Even-membered chains pack together in a uniform fashion more compactly than do odd-membered chains. It is due to Arrange the compounds from lowest boiling point to highest boiling point. Environmental Protection Agency. Cusabio Mycoplasma pneumoniae Recombinant; Cusabio C-terminal Avi-tagged Recombinant; Cusabio Human cytomegalovirus Recombinant; Analysis of HLA gene polymorphisms in East Africans reveals evidence of gene flow Boiling Point (°C) Feature. Polyphosphoric acid reagent grade, 115% H3PO4 basis; CAS Number: 8017-16-1; EC Number: 232-417-0; Linear Formula: Hn+2PnO3n+1 at Sigma-Aldrich IUPAC Standard InChIKey: NBIIXXVUZAFLBC-UHFFFAOYSA-N Copy CAS Registry Number: 7664-38-2 Chemical structure: This structure is also available as a 2d Mol file or as a computed 3d SD file The 3d structure may be viewed using Java or Javascript. CH3N3>HN3 Chemical Bonding and Molecular Structure Chemistry Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, The iso-corrosion diagram 0. In an open system this is called atmospheric pressure. Yellow solid. The H 3 PO 4 solution concentration increases with the evaporation of Note also that the boiling point for toluene is 111 o C, well above the boiling point of benzene (80 o C). 82. 12 Figure 4 Isocorrosion Chart for Type 316L Stainless Steel in Phosphoric Acid . Concentrated sulfuric acid is not used to make HBr from NaBr Write an equation for the reaction of NaBr with H3PO4 to produce HBr The polarity increases attraction between the molecules, hence, both the boiling point and viscosity are high. This answer is: If you used 1-methyl-1-cyclohexanol as the reactant and H3PO4 (85%) as the reagent, draw the possible alkenes you could have formed. Grams (g) View Product Details. 5&deg;C 4. Boiling point is the temperature at which a substance changes its physical state from liguid to vapours. . 2 mm Hg ( 20 °C) Vapour density Use a weaker acid, such as H3PO4 instead of H2SO4. Identification: Pass Test: Packaging: Flint Glass Bottle Vapour-liquid equilibrium of 2-propanol/water showing positive azeotropic behaviour. Alternatively, orthophosphoric acid molecules can combine with themselves to form a variety of compounds referred to as phosphoric acids in a more general way. The anhydrous acid crystallizes in two polymorphs, which melt at 54. 0 m acetic acid, CH3COOH (B) 1. Synonyms: Orthophosphoric acid. from publication: Phosphoric Acid Wet Etching of Sandwiched Silicon Nitride Among the existing high boiling point chemicals already used in the microelectronic industry, we have H 3 PO 4 and KOH. 180. With an APHA color of =40 and an impressive vapor density of 3. C. 4 Octanol/water partition coefficient as log Pow: -0. Polyphosphoric acid 115% H3PO4. The table above distinguishes between protic and aprotic solvents. 1000 Grams. London dispersion forces dipole-dipole interactions hydrogen bonding Draw the Lewis structure for chloromethane, CH, Cl. 0 m glucose, C6H12O6 Can someone explain this to me using van't hoff factor? The incorrect order of boiling point is- 1. Hexan-2-ol can be prepared from hexan-1-ene using this method. See answers (2) Best Answer. 1 °C (70. CH3N3>HN3 Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level Which aqueous solution has the highest boiling point? (A) 1. To find the mole fraction and percentage of each element in H3PO4, divide each total from step 3 by the total molar mass found in step 4: Mole Fraction Percent; H (Hydrogen) 3. 5 °F) 85% 21. Quality Segment. Q2 . Phosphoric acid is a triprotic acid which means Under extreme pressures, such as 16. 99 g / mol, the melting point of the solid is 42. That means that the increase in the boling point will be related to the number of particles (molecules or ions) present in the solution. The boiling point of a liquid varies according to the applied pressure; the normal boiling point is the temperature at which the vapour pressure is equal to the standard sea-level atmospheric pressure (760 mm [29. Sulfuric acid (American spelling and the preferred IUPAC name) or sulphuric acid (Commonwealth spelling), known in antiquity as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen, and hydrogen, with the molecular formula H 2 SO 4. The customer is responsible to pay the return shipping Boiling point: 158°C Melting point: 21. The corrosion rates are ∼0. 6: The iso-corrosion diagram 0. CH3N3>HN3 Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level H3PO4. ; If a strong acid such as H 2 SO 4 or p-TsOH is An aqueous solution containing 35. 572 g/cm3 @ 20 °C (68 °F) Melting Point-17. Water is made up of oxygen and hydrogen and can form hydrogen The production of phosphoric acid (H3PO4) involves various commercial methods, notably the wet process, which utilizes concentrated sulfuric acid and phosphate rock. [6] It is also used as a reagent in the preparation of organofluorine compounds. 1825. 5. • Hg(CH3)2 • H3PO4 • AsH3 •CBr4 •Ar. 35 °C. Boiling Point Definition. 00 g/mol Storage temp: RT Art. The greater the pressure, the more energy required for liquids to boil, and the higher the boiling point. The presence of the alkene functional group can be indicated by carrying out simple reactions in which a color change can be observed. 4 Chemical Tests. The α-methyl group can participate in condensation reactions. j) Upper/lower 1. American Conference of Governmental Industrial Hygienists A compound's "normal boiling point" refers to its boiling point at a pressure of \(760 \: \text{mm} \: \ce{Hg}\). 5. Phosphoric Acid is a chemical compound with a chemical formula of H₃PO₄. SPILL: Increase the • The boiling point of phosphoric acid is 158 °C (316 °F; 431 K) When phosphoric acid is above 213 °C (415 °F; 486 K), it will decompose slowly. Food packaging; Food and Nutrition; Cleaning products; Pulp and paper; Solvents; Personal care; Note also that the boiling point for toluene is 111 o C, well above the boiling point of benzene (80 o C). To make use of this tool: Select the substance that you're interested in studying. Skip to main content. Do not wash out container and use it for other purposes. Phosphomolybdic Acid Hydrate – 500 g Science; Chemistry; Chemistry questions and answers; 541/1000 Resources re: Arrange the compounds from lowest boiling point to highest boiling point. My Course. Orthophosphoric acid molecules can combine with themselves to form a variety of compounds which are also referred to as phosphoric acids, but Phosphorous acid (or phosphonic acid) is the compound described by the formula H 3 PO 3. H3PO4>Me3PO4 4. 0 m glucose, C6H12O6 So, I did some research and found that the formula for finding change in boiling point = Tb = i Kb m m and Kb are all the same values, because they are all aqueous The incorrect order of boiling point is- 1. When it is less dense, it is a colorless, viscous liquid arrange the following compounds from lowest boiling point to highest boiling point AsH3, H3PO4, CBr4, Hg(CH3)2, Ar There are 2 steps to solve this one. Learn how it is produced, what it l H3PO4: Melting Point: 42. Research What is the boiling point of phosphoric acid? Updated: 5/28/2024. - AsH3 (Arsenic Hydrate) has the next lowest boiling point. 25 (anhy. • • • • • Density: Boiling point: Melting point: Solubility: Appearance: • Odor: H3PO4 98 g/mol trihydroxidooxidophosphorus phosphoric acid 1. 3 and 71. Q. 0603 CAS Nr:7664-38-2 Physical Form colourless Melting point: 21°C Boiling point: 158°C Flash point: - Density: 1,64 g/ml Mol Weight: 98. Highest boiling point Lowest boiling point Answer Bank HF CH OH He Cl CH,O of use contact us help privacy policy es | careers about us . CAS Number. 12 mm year −1 up to a concentration of 60%, at all temperatures up to boiling. Osmotic Pressure. It is a versatile and cost-effectiv pH: 1: Melting Point: 21°C: Boiling Point: 158°C: Density: 1. At the boiling point The wet etching of nitride films is often performed in concentrated hot orthophosphoric acid (H3PO4). 573 Boiling Point (°C): 135-158 Freezing Point (°C): -17-21 Solubility: Water and Alcohol Synonyms: ortho-Phosphoric Acid Shelf Life (months): 36 Storage: White All About Elimination Reactions of Alcohols (With Acid) The hydroxyl group of alcohols is normally a poor leaving group. Organic derivatives of phosphorous acid, compounds with the formula RPO 3 H 2, are called Phosphoric acid also called orthophosphoric acid is a weak acid with the chemical formulation H3PO4. e. 51429-74-4. Purity - 115%; MW - 98. A) $\ce{NaCl}$ B) $\ce{CaCl2}$ C) $\ce{H3PO4 }$ D) $\ce{C6H12O6}$ (glucose) When dissolved in water, $\ce{H3PO4 }$ dissociates into 4 ions, which is more than any of the other compounds. 030857: × 100 = 3. At the boiling point They has much advantages, such as low solubility in water, low toxicity, high boiling point, excellent dissolving capacity for H 3 PO 4 but faint for metal ions, etc. Molecules of diethyl ether, C 4 H 10 O, are held together by dipole-dipole interactions which arise due to the polarized C-O bonds. Structure of the [Ti 4 F 18] 2-dianion. Get contact details & address of companies manufacturing and supplying Phosphoric Acid across India. , BP, USP CL00. Zn II. Buy Now. It is a colorless, odorless, and viscous liquid that is soluble with water. boiling the solution to drive off carbon dioxide and cooling to permit the dodecahydrate are used in production. Products Building Blocks Explorer Genes Papers Technical Documents Site Content Chromatograms - Ar (Argon) has the lowest boiling point due to the absence of intermolecular forces. Study with Quizlet and memorise flashcards containing terms like Hydrogen bromide (HBr) could be used in the overall conversion of P into R, instead of using HCl Hydrogen bromide is made by the reaction of NaBr with concentrated phosphoric acid. 1,013 hPa - OECD Test Guideline 102 f) Initial boiling point and boiling range 296. Yes, this is below the boiling points of your products, however, because boiling works through vapor pressure, you don’t have to be at the boiling point to collect your product. Browse Phosphoric acid and related products at MilliporeSigma. 3 °C (210. And we all know that the boiling point of water is 100°C. 5 Boiling Point. It has a boiling point of 158 °C and a melting point of 42. This page explains what acid anhydrides are and looks at their simple physical properties such as boiling points. Regards. q q q: Vous recevez une contravention pour excès de vitesse. 06 g/mL at 25 C EC Number: 232-417-0 UNSPSC Code: 12352106 General description: Polyphosphoric acid (PPA) is widely employed as acylation and alkylation reagent in various reactions. Products. We accept all returns within 30 days of purchase that have not been opened. In addition, KOH is prohibited in many production 85+% H3PO4 For laboratory use CL00. • Hg(CH 3) 2 • H 3 PO 4 Melting point/freezing point ~-17 °C (~1 °F) Initial boiling point and boiling range ~135 °C (~275 °F) Flash point Not Flammable Evaporation rate Not Available Flammability (solid, gas) Not Flammable Upper/lower flammability or explosive limit Not Explosive Vapor pressure 0. Écrivez ces propositions en utilisant p p p et q q q et des connecteurs logiques (y compris des négations). 0605 CAS Nr:7664-38-2 Physical Form Boiling point: 158°C Flash point: - Density: 1,71 g/ml Mol Weight This leads to higher boiling points and enthalpies of vaporization for compounds that can form multiple hydrogen bonds like water. CH3N3>HN3 Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level Study with Quizlet and memorize flashcards containing terms like Which aqueous solution has the highest boiling point? (A) 1. Showing 1-27 of 27 results for "H3PO4" within Products. (The broken line represents the Ans B) 1. 8 °F) at 215 m (705 ft) elevation. The boiling point of propane is −42. Boiling Point (°C) Feature. Purity. Study now. The boiling point of a liquid varies depending upon the surrounding environmental pressure. Higher Atmospheric Pressure = More Energy Required to Boil = Higher Boiling Point Science; Chemistry; Chemistry questions and answers; 541/1000 Resources re: Arrange the compounds from lowest boiling point to highest boiling point. Product Info. 8: Acetic acid anhydride (CH 3 COO) 2 O: 139: Acetone CH 3 COCH 3: 56. a) measure out 11cm3 of hexan-1-ene into a boiling tube in an ice bath b) carefully add 5cm3 of conc phosphoric acid to High-chromium cast irons are suitable in most cases. 5 °C (0. It is a colorless liquid with a slight peppermint or camphor odor. Pure phosphoric acid is a white crystal-like solid with a melting point of 42. Below the table, examples of molecule structures for the different classes of hydrocarbons are given, together with a definition of the different classes of In contrast, molecular compounds are formed by the sharing of electrons between atoms, resulting in discrete molecules that have lower melting and boiling points and don’t conduct electricity when dissolved in water. This acid is a non-toxic acid and in its pure form, it is a solid at room temperature. 0 g of nonvolatile sucrose, C12H22O11, in 350. Key applications. As delivered 85 % ortho -phosphoric acid will boil at 157°C, higher concentrations are required in order to increase process temperature above 160°C. 0&deg;F –17. 35 C; Taste sour flavor; Molecular Weight 97. Its isomers are 1-butanol, 2-butanol, and tert-butanol, all of which are important industrially. Add To Cart. 16m. The bath temperature can range from 150°C to 180°C (boiling point) with a corresponding etch rate between 10 and 100 Å/min. An azeotrope (/ ə ˈ z iː ə ˌ t r oʊ p /) [1] or a constant heating point mixture is a mixture of two or more liquids whose proportions cannot be changed by simple distillation. 15. Triethylamine is prepared by the alkylation of ammonia with ethanol: [10]. Skip to Content. Flash points: 28 °C, closed cup; 37. Suggest Corrections. Unlike melting points however, boiling points are not generally used as a gauge of purity. 0 m phosphoric acid, H3PO4 (D) 1. The data include the composition of a mixture by weight (in binary azeotropes, when only one fraction is given, it is the fraction of the second component), the boiling point (b. For example, the boiling point of water is 100 °C. Highest boiling point Lowest boiling point Answer Bank Kr CH,CI CHF HOOH F, Select the intermolecular forces present between CH, Cl molecules. 5 °F) Odor. 4 Comet Chemical Company Ltd. All the aqueous solutions presented are electrolytes, i. [2] This happens because when an azeotrope is boiled, the vapour has the same proportions of constituents as the o-Phosphoric Acid 85% W/W, Meets ACS Specifications, Meets Reagent Specifications for testing USP/NF monographs GR ACS CAS Number: 7664-38-2; Synonyms: Phosphoric acid,Orthophosphoric Acid,Orthophosphoric acid; Linear Formula: H3PO4 at Sigma-Aldrich 3. Soluble. Initial boiling point and boiling range 158°C (316°F) Flash point Not Flammable Evaporation rate Not Available Flammability (solid, gas) Not Flammable Upper/lower flammability or explosive limit Not Explosive Vapor pressure 0. Formula: H3PO4 Formula weight: 98 Melting Point: '19-21°C Boiling Point: 158°C (760mmHg) Density: 1. 3. 3463 Thomas Street Innisfill, ON, Canada, L9S 3W4 Telephone: (705) 436 5580 Phosphoric Acid 75-85% SDS Preparation Date (mm/dd/yyyy): 12/11/2015 Page 1 of 11 SAFETY DATA SHEET Notice that the boiling points of the unbranched alkanes (pentane through decane) increase rather smoothly with molecular weight, but the melting points of the even-carbon chains increase more than those of the odd-carbon chains. briefly noted that Si 3 N 4 would be first hydrated by H 2 O and then attacked by H 3 PO 4 in the dissolution reaction of Si 3 N 4 [9], but the exact mechanism has not been clarified. To change into vapour state, bonds between liquid needs to be broken, thus boiling point depends upon the intermolecular forces of attraction and hydrogen bonds. H 3 PO 4. Boiling Point: 200 °C: Melting Point: 73. Never use hot water and never add water to the acid. Pack Mod The incorrect order of boiling point is- 1. Data given in this calculator refer to normal pressure, that is 1013,25 hPa. National Toxicology Program Chemical Repository Database. The compound is a component of polyphosphoric acid, an important These compounds typically have low melting and boiling points. Na2SO3 (A) I only (B) II only (C) Both I and II H3PO4. Acids: Compounds such as sulfuric acid (H2SO4) and phosphoric acid (H3PO4) are acids, meaning they can donate hydrogen ions (protons) to a solution. General content of 85% ~ 95%. 3°C. Orthophosphoric acid is a Solubility of UO2(NO3)2, TBP, and its degradation products in the organic and aqueous phases of the system TPB-H2O-HNO3-UO2(NO3)2 at 25–128°C over the uranyl nitrate concentration range 200–1200 g 1−1 is studied. Polyphosphoric acid ~105% H3PO4 basis; CAS Number: 8017-16-1; EC Number: 232-417-0; Linear Formula: Hn+2PnO3n+1 at Sigma-Aldrich CAS Number: 7664-38-2 Formula Weight: 98. Product Line. 1 °C (106. Arrange the compounds from lowest boiling point to highest boiling point. Note that most crude phosphoric acid contains appreciable amounts Molweight, melting and boiling point, density, flash point and autoignition temperature, as well as number of carbon and hydrogen atoms in each molecule for 200 different hydrocarbons. Other names: Orthophosphoric acid; Phosphoric acid ortho; o-Phosphoric acid; Acide phosphorique; Acido Solubility of UO2(NO3)2, TBP, and its degradation products in the organic and aqueous phases of the system TPB-H2O-HNO3-UO2(NO3)2 at 25–128°C over the uranyl nitrate concentration range 200–1200 g 1−1 is studied. 885 g/cm³ (at 85% concentration) Solubility: Completely soluble in water, forming In case of daily intake of 2 ~ 4 g, it can cause mild diarrhea. The hydrochloride salt, triethylamine hydrochloride (triethylammonium chloride), is a colorless, odorless, and hygroscopic powder, which Download scientific diagram | Boiling point of phosphoric acid at different concentrations in deionized water. 77 (estimated) Viscosity: 40 mm²/s at 20°C H3PO4. It is good practice to bring the vapours into contact with a cold surface and to drive the condensed liquid back into SQ'B ÉJí T ÆM|¬ó|ÿïûÓþ¿ÃZ÷ã r2@jÉ/ž¦Ð ’4™Ék m§ ¹,Ù’± Yr%™G þÞ7µï¯§¨ñëm¸µÑæV $­sYB w§žéþÓ ˜í ÀY¤~ § GU4óÏ=÷>Ó¯ @ äjII£ÕPc(ó £´Æ˜lƒØX ù wq L¨µ. It is widely used in the food and beverage industry, the automotive industry, and Learn about phosphoric acid (H3PO4), a colorless, viscous liquid with a boiling point of 158 C (85% aq). water + white phosphorus + diphosphorous tetraiodide phosphoric acid + phosphonium iodide Chemical Formula: H3PO4: Boiling Point: 158 Degree Celsius: Grade: Laboratory Grade: Phosphoric Acid is a colorless and odorless inorganic chemical compound that is available in the best price range. You will collect about 4-6 mL of product, which will include Wet etching of Silicon nitride (Si3N4) by phosphoric acid (H3PO4) is one of the key steps in the semiconductor fabrication process, especially for three‐dimensional integrated circuits (ICs). Show transcribed image text. The boiling point is specific for the given substance. Below the table, examples of molecule structures for the different classes of hydrocarbons are given, together with a definition of the different classes of Phosphorus pentoxide is a potent dehydrating agent as indicated by the exothermic nature of its hydrolysis producing phosphoric acid: . 994 g/mol Study with Quizlet and memorize flashcards containing terms like Which element has the fewest valence electrons available for bonding? a) iodine b) aluminum c) carbon d) nitrogen, How many valence electrons are available for bonding in bromine (Br)? a) one b) two c) five d) seven, How many valence electrons are available for bonding in silicon? a) four b) five c) eight d) fourteen 3. 00. Phosphorus pentoxide is a potent dehydrating agent as indicated by the exothermic nature of its hydrolysis producing phosphoric acid: . However, the high viscosity of aliphatic alcohol is not conducive to mass transfer between leachate and organic phase. 12 Figure 3 Freezing Point versus Concentration . One such reaction is with bromine in The incorrect order of boiling point is- 1. It is also soluble in ethanol. 5 MPa in a pressurized water reactor, the boiling point of water reaches 350 ℃. The molecule is an unsymmetrical ketone. H3PO4 : Applications: Industrial : Recommended Use: Water treatment; Acidulant; Flocculant Boiling Point. Study with Quizlet and memorize flashcards containing terms like Rank the boiling points of the following compounds from lowest to highest: C12H22O11 (sucrose), O2, NaF C12H22O11 (sucrose) < O2 < NaF O2 < NaF < C12H22O11 (sucrose) O2 < C12H22O11 (sucrose) < NaF NaF < O2 < C12H22O11 (sucrose) NaF < C12H22O11 (sucrose) < O2, Which of the following Which aqueous solution has the highest boiling point? (A) 1. Pow: log Pow: pH. 0602 CAS Nr:7664-38-2 Physical Form Boiling point: 158°C Flash point: - Density: 1,71 g/ml Mol Weight: 98. Concentrated sulfuric acid is not used to make HBr from NaBr Write an equation for the reaction of NaBr with H3PO4 to produce HBr Boiling point: 158°C Melting point: 21. The hydrochloride salt, triethylamine hydrochloride (triethylammonium chloride), is a colorless, odorless, and hygroscopic powder, which H3PO4 CAS Number 7664-38-2. Gene Alias. 15. In 1982, IUPAC defined the standard boiling point of a liquid as the temperature at which the liquid boils under a pressure of 1 bar. It is widely used in fertilizers, food additives, detergents, and other products, but it is also Orthophosphoric acid (H3PO4), usually referred to as phosphoric acid, is a clear, water-white liquid which is derived from phosphate rock. : MFCD00084480 Purity: 115% H3PO4 basis Boiling Point: 300 C(lit. Nr. The term "phosphoric acid" can also refer to a chemical or Allotropes of Phosphorus. Phosphoric acid is a mid-strength mineral acid having the chemical formula H 3 PO 4 that is more correctly called orthophosphoric acid, to distinguish it from other phosphate-containing acids. Freezing Point Depression. colourless. 6&deg;C 21. ; With tertiary alcohols, H 2 O can then leave, resulting in a carbocation. It is very soluble in water being able to dissolve 446 grams of compound for each 100 ml of solvent. The seven common strong acids are: #"HClO"_4 The compound has a molecular weight of 97. Why phosphoric acid is viscous? Water has an unusually high boiling point for a liquid. CH3N3>HN3 Recommended MCQs - 160 Questions Chemical Bonding and Molecular Structure Chemistry Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with Structural Formula. the Ram rasayan chemicals - offering low price phosphoric acid agriculture grade boiling point: 158 a c in chimbli, pune with product details & company information. Solve Study Textbooks Guides. 78 °C, open cup . Then we say that liquid boils. Someone told me though, that because it's a weak Click here:point_up_2:to get an answer to your question :writing_hand:the incorrect order of boiling points is Recent Posts. r&Û w s¶2 Ñ] ¿²,ë³Óî ™ZOÇ ¤$÷ ØòÖÂxÐe˜’s¿ÝÒ/k0ˆ_` ”{ 3¯·ýÝþƨQ Ô c2VØ÷·Û[ 1 ¸ & 7i@Í=|ÕÛLj« Î3ÕEc¤× Pð —«+Rr_ÙSÈ!p8÷ Triethylamine is prepared by the alkylation of ammonia with ethanol: [10]. Consequently liquids in Denver boil some 4 to 5°C lower than the normal boiling point. The higher the number of particles (molecules or ions) the higher the increase in the boiling point. 5 °F at 760 mmHg (NTP, 1992) National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 4 (vs air), this liquid is a game-changer in scientific research. Continue to concentrate to obtain colorless columnar crystals, density (18 deg C) 1. Draw the Lewis structure for carbon tetrabromide, CBr 4. It is also used in dental cements, in albumin derivatives preparation and in the sugar and textile industries. American Conference of Governmental Industrial Hygienists These compounds typically have low melting and boiling points. The temperature at which liquid vapour pressure equals atmospheric pressure is referred to as boiling point. 684 g/cc Forms Liquid, Viscous, White. Melting Point (°C) Physical Form. 994 g/mol. 88 g/cm; HS Code 280920; Raw Material elemental (yellow) phosphorus, air, and water. However, sulfuric acid can only Direct polycondensation of glycerol (GL) and phosphoric acid (PA) has been studied for the first time. A carboxylic acid such as ethanoic acid has the structure: Phosphoric acid puriss. At sea level, water boils at The boiling point of different liquids is different for a given pressure. - H3PO4 (Phosphoric Which aqueous solution has the highest boiling point? (A) 1. 2&deg;F 70. 35° C. Extremely Hazardous Substances (EHS) Chemical Profiles and Emergency First Aid Guides. Also the boiling point increases due to the molecular mass. 5 (100 g/l, H₂O, 20 °C) Vapor pressure: 2 hPa (20 °C) Viscosity kinematic: 30. The purity of the cyclohexene is determined by gas chromatographic (GC) analysis and a % yield calculated. This acid is diprotic (readily ionizes two protons), not triprotic as might be suggested by this formula. 35°C (solid form) Boiling Point: 158°C (decomposes) Density: 1. 13 Figure 5A Corrosion Resistance of Non-Metals Boiling point: 158 °C (1013 mbar) Density: 1. 69 High-silicon cast irons best resist this acid, at all concentrations and almost all temperatures (see Figure 28). Question: Which aqueous solution has the highest boiling point? (A) 1. Melting Point. Molecular Formula H3PO4; Other Names orthophosphoric acid, monophosphoric acid or phosphoric(V) acid; Purity not usually exceeding 85%. Isobutanol (IUPAC nomenclature: 2-methylpropan-1-ol) is an organic compound with the formula (CH 3) 2 CHCH 2 OH (sometimes represented as i-BuOH). Upload syllabus. This leads to higher boiling points and enthalpies of vaporization for compounds that can form multiple hydrogen bonds like water. Vapor Pressure Lowering (Raoult's Law) 16m. Compare the different butane alcohol derivatives shown below. Find here Orthophosphoric Acid H3PO4, CAS-7664-38-2 60% manufacturers, suppliers & exporters in India. ∙ 11y ago. Phosphoric Acid | H3PO4 or H3O4P | CID 1004 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more. 77 (estimated) Viscosity: 40 mm²/s at 20°C Use the boiling point calculator to find the boiling point at a given pressure for different substances such as water, hydrogen, methane, or others. Since the boiling point is often used to identify a liquid, chemists living at high altitudes must be careful to allow for this difference. a) Vous ne roulez pas à plus de 65 milles à l'heure. 1°C Density (at 25°C): 1. 554 °F at 760 mmHg (EPA, 1998) U. The incorrect order of boiling point is- 1. ) of a component, the boiling point of a mixture, and the specific gravity of the mixture. Download SDS (PDF) Phosphomolybdic Acid Hydrate – 100 g $ 110. 4 (air=1) Van Gelder et al. Specific gravity 1. Density 1. 0 m glucose, C6H12O6, Addition of small amounts of which solids to 4 M HCl will result in gas evolution? I. The boiling point depends on the pressure. 030 g / ml. Include the names of any relevant forces and particles. Hexan-2-ol does not mix with water and has a boiling point of 140. 5 mm2/s (20 °C) Dimensions; Materials Information; Toxicological Information; Discover the powerful properties of o-Phosphoric Acid 85% W/W. Phosphorous acid is an intermediate in the preparation of other phosphorus compounds. 00 G/MOL; Boiling Point 300 Celsius; CAS No - 8017-16-1; Return & Refund Policy. P 4 O 10 + 6 H 2 O → 4 H 3 PO 4 (–177 kJ). Answer and Explanation: 1 This optimization cannot be done independently, since the boiling point of phosphoric acid varies with the concentration, as show in Figure 3.