The first equivalence point for 40.00 mL of 0.1000 M H3PO4 is reached when 21.38 mL of 0.1871 M NaOH is added. If the pH at the first equivalence point is 4.20, determine Ka2 of phosporic acid:

Q: 100.0mL of a 0.050M HNO2 solution is titrated with a 0.10M NaOH solution. How many mL of NaOH would…

A: Let the volume of NaOH = V mL pH = 3.39 Molarity of HNO2 = 0.050M Molarity of NaOH = 0.10 M

Q: pH calculation when the first equivalence is reached: Calculate the pH of 50.0 mL of 0.250 M oxalic…

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Q: A) At 25°C, a 0.21 M  solution of diethylamine, (C2H6)2NH that acts as a weak base, is 4.0% ionized.…

A: Given that the conc. of weak base (C2H5)2NH =  0.21  M   percent dissociation = 4.0 % The…

Q: Phosphoric acid is a triprotic acid with the p?a values p?a1=2.148, p?a2=7.198, and p?a3=12.375.…

A: Ionization of phosphoric acid is,

Q: Calculate the pH of 50.0 ml of 0.250 M oxalic acid (HOOCCOOH) upon addition of 15 mL of 0.500 M…

A: Oxalic acid is a diprotic weak acid, whereas monoacidic NaOH is a strong base. Given the volume of…

Q: Suppose that 80.0 mL of an aqueous 0.200 M methylamine, CH3NH2(aq), is titrated with a 0.400 M…

A: The relation between pH and concentration of  acid and its conjugate base is calculated using the…

Q: What is the pH of a solution prepared by mixing 50.00 mL of 0.10 M methylamine, CH 3NH 2, with 25.00…

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Q: Phosphoric acid is a triprotic acid with the p?apKa values p?a1=2.148,  p?a2=7.198, and…

A:

Q: Express the pH of the solution to three decimal places.  A mixture formed by adding 56.0 L of…

A: Calculate the number of moles of hydrogen ion (x) released from HCl.

Q: A 0.144 M solution of HA has a pH of 2.26 at 25°C. What is the value of Ka for HA? (the answer…

A: Given that, a 0.144 M solution of HA has a pH of 2.26 at 25°C. I.e. concentration is C = 0.144 M.…

Q: The p?a of imidazole hydrochloride is 6.993. Calculate the pH of the solution if 1.90 mL of 1.08 M…

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Q: In a titration of 26.5 mL of a 0.425 M solution of a diprotic acid H2C4H4O6 (tartaric acid) with…

A: Moles of base =  2 × moles of acid

Q: Calculate the pH of a solution that is 0.250 MM in sodium formate (HCOONaHCOONa) and 0.110 MM in…

A: The pH of the solution is calculated as shown below where pka value is 3.75. pH=pKa+logSodium…

Q: Phosphoric acid is a triprotic acid with the p?apKa values p?a1=2.148pKa1=2.148,  p?a2=7.198…

A:

Q: aNH2

A: Generally, sodium amide (NaNH2) is a very good nucleophilic reagent as well as it is used as a base.…

Q: Barbital is a weak monoprotic acid with Ka = 1.0 x 10-8. What is the pH of a 1.5 x 10-4 M solution…

A: Let Barbital maybe HA Ka  = 1x10-8 [HA] = 1.5x10-4 draw an ICE table

Q: Calculate the expected pH of a solution created by mixing 30.00 ml of 0.125 M Na(OAc), 20.00 ml of…

A: A solution that contains weak acid and its conjugate base becomes a buffer solution. Buffer…

Q: Calculate the pH of a solutuon made by mixinf 50.00 mL of 0.100 M NaCN with    (a) 4.20 mL of…

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Q: Aspirin (acetylsalicylic acid) is absorbed from the stomach in the free (non-ionized) acid form. If…

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Q: A 1.50 g sample of ascorbic acid, vitamin C, is dissolved in 100.0 mL of water and titrated with…

A: The following information given in the question - Mass of ascorbic acid , vitamin C = 1.50 g Volume…

Q: used as preservatives in vinegar, soy sauce, etc. The pH of a 0.10 M aqueous solution of sodium…

A: Sodium benzoate is salt of weak acid-strong base type salt pH = 1/2(14 + pKa + log([C]) 8.60 =…

Q: A 1.50 g sample of ascorbic acid, vitamin C, is dissolved in 100.0 mL of water and titrated with…

A: Given, Mass of ascorbic acid, Vitamin C = 1.50 g Volume of ascorbic acid solution = 100 mL Molarity…

Q: The pH of a 0.6 M aqueous solution of formic acid, HCHO2, at 25.0 °C is 1.7. What is the value of Ka…

A: Given that,  pH of formic acid = 1.7 Concentration of formic acid = 0.6M

Q: A solution made with 0.120 moles of phosporic acid (H3PO4), dissolved in 164 mL of solution, was…

A:

Q: Codeine (C18H21NO3) is a weak organic base. A 5.0 x 10-3Msolution of codeine has a pH of 9.95.…

A: SOLUTION: Step 1: The ionization equation for Codeine ( C18H21NO3 ) and the equilibrium expression…

Q: The first equivalence point for 40.00 mL of 0.1000M H3PO4 is reached when 21.38 mL of 0.1871 M NAOH…

A: The pH of the solution is the power of protons in the solution. While pOH is related to the basicity…

Q: a) Calculate [H3oʻ], [C2H3O2¯ ] and [HC2H3O2] for a solution prepared by mixing 35.0 mL of o.10 M…

A: The number of moles of acetic acid in 35.0 mL of 0.10 M acetic solution and the number of moles of…

Q: A 0.50 M solution of an acid HA has pH = 2.24. What is the value of Ka for the acid?

A: Given, molarity(M)=0.50M. The pH of the acid =2.24 To  calculate, Ka(dissociation constant of the…

Q: 500

A: Dear student I have given answer to your question in the image format.

Q: HA is a weak acid. We mix 3.000 L of a 0.555 M solution of HA with 1.000 L of a 0.444 M solution of…

A: Given data 3.000 L of a 0.555 M solution of HA  is  mixed with 1.000 L of a 0.444 M solution of…

Q: A 0.040 M solution of a monoprotic acid (HA) is 14% ionized. Calculate the ionization constant, Kc…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Tris(hydroxymethyl)aminomethane [(HOCH₂)₃CNH₂,known as TRIS] is a weak base used in biochemical…

A: solution- auto dissociation of a compound is a temperature dependent process and the seperation…

Q: Sodium benzoate, NaC6H5COO, is used as preservatives in vinegar, soy sauce, etc. The pH of a 0.10 M…

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Q: Phosphoric Acid (H3PO4) has pKa values: 3.13, 4.76, 6.40. What is the pH made by dissolving 0.200…

A: When a substance increases the concentration of the hydrogen ion in an aqueous solution, then the…

Q: A 0.018 M solution of salicylic acid, HOC6H4CO2H, has the same pH as 0.0038 M HNO3solution. (a)…

A: Given information,        Concentration of salicylic acid, HOC6H4CO2H = 0.018 M

Q: A1 liter solution is made by adding 0.5983 moles NaH2PO4 and 0.5456 moles NazHPO4. What will be the…

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Q: 0.653 g of a monoprotic acid (mm = 157 g/mol) is dissolved in water to produce 50.0 mL of a solution…

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Q: What is the Ka or Kb expression for NH4Cl and Na2CO3? What is the value of Ka or Kb for both…

A: Salt hydrolysis: It is a reaction in which an acidic or basic solution is formed when one of the…

Q: Calculate the pH of a solution that contains 5.18 M of weak acid HA and 1.26 M NaA. The Ka of…

A: Given :  [HA] = 5.18 M  [NaA] = 1.26 M  Ka for Weak acid (HF) = 0.00063  To calculate :  pH of…

Q: Ascorbic acid (vitamin C, C6H8O6) is a cliprotic acid (Ka1= 6.8 x 10-5 and Ka2 = 2.7 x 10-12). What…

A:

Q: Aspirin (acetylsalicylic acid) is absorbed from the stomach in the free (non-ionized) acid form. If…

A: Given : pKa of aspirin=3.50 pH of stomach=2.95

Q: Are solutions of the following salts acidic, basic, or neutral? For those that are not neutral,…

A: Since you have posted questions with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: What

A: Buffer is the solution of mixture of weak acid/weak base with its salt of strong base/strong acid

Q: What volume (in mL) of a 1.0 M solution of imidazolium chloride must be added to a 500 mL solution…

A: Buffer solutions are the solutions which counter the pH change on addition of small amount of acid…

Q: A solution is prepared at 25 °C that is initially 0.34 M in dimethylamine ((CH3),NH),a ((CH3),NH,C).…

A: Hi, you have posted multiple questions we will answer the first question. If you want any specific…

Q: Prepare 250ml of the following buffer solutions. Concentration Buffer solution pka Desired ph 0.50 M…

A: Buffers are the solution which tend to retain their pH when small amount of acid or base is added to…

Q: Calculate the pH of a solution made by mixing 50.0 mL of 0.10 M NaOH and 25.0 mL of 0.10 M HCI.…

A:

Q: Calculate the pH of a solution prepared by mixing 300 mL of 0.25 M sodium hydrogen ascorbate and…

A: Given: Volume of sodium hydrogen ascorbate= 300 mL Concentration of sodium hydrogen ascorbate= 0.25M…

Q: A group of students perform a titration experiment. The buret tube is filled to the 0.00ml line with…

A: To solve this question, first find equivalence point volume using dilution law. Then calculate moles…