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Potassium sorbate,KC H,O, (molar mass 150. g/mol) is commonly added to diet soft drinks as a preservative. A stock solution of KC H,O,(aq) of known concentration must be prepared. A student titrates 45.00 mL of the stock solution with 1.25 M HCl(ag) using both an indicator and a pH meter. The value of K for sorbic acid, HC,H,O, is 1.7 x 105. a. Write the net-ionic equation for the reaction between KC H,0,(aq) and HCl(aq). b. A total of 29.95 mL of 1.25 M HCl(aq) is required to reach the equivalence point. Calculate the number of moles of H* added. c. Write the equation by which sorbic acid dissolves in water. d. Write the K, expression for sorbic acid dissolving in water. e. Calculate the pH of a 0.750M solution of sorbic acid.

Potassium sorbate,KC H,O, (molar mass 150. g/mol) is commonly added to diet soft drinks as a preservative. A stock solution of KC H,O,(aq) of known concentration must be prepared. A student titrates 45.00 mL of the stock solution with 1.25 M HCl(ag) using both an indicator and a pH meter. The value of K for sorbic acid, HC,H,O, is 1.7 x 105. a. Write the net-ionic equation for the reaction between KC H,0,(aq) and HCl(aq). b. A total of 29.95 mL of 1.25 M HCl(aq) is required to reach the equivalence point. Calculate the number of moles of H* added. c. Write the equation by which sorbic acid dissolves in water. d. Write the K, expression for sorbic acid dissolving in water. e. Calculate the pH of a 0.750M solution of sorbic acid.

Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter4: Reactions In Aqueous Solution
Section: Chapter Questions
Problem 61QAP
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Please answer parts d and e with expanations
Potassium sorbate,KC,H,O, (molar mass 150. g/mol) is commonly added to diet soft drinks as a preservative. A stock solution of KC H,O,(aq) of known concentration must be prepared. A student titrates 45.00 mL of the stock solution with 1.25 M HCl(ag) using both an indicator and a pH meter. The value of K for sorbic acid, HC,H,O, is 1.7 × 105. a. Write the net-ionic equation for the reaction between KC H,0,(aq) and HCl(aq). b. A total of 29.95 mL of 1.25 M HCl(aq) is required to reach the equivalence point. Calculate the number of moles of H* added. c. Write the equation by which sorbic acid dissolves in water. d. Write the K, expression for sorbic acid dissolving in water. e. Calculate the pH of a 0.750M solution of sorbic acid.
Transcribed Image Text:Potassium sorbate,KC,H,O, (molar mass 150. g/mol) is commonly added to diet soft drinks as a preservative. A stock solution of KC H,O,(aq) of known concentration must be prepared. A student titrates 45.00 mL of the stock solution with 1.25 M HCl(ag) using both an indicator and a pH meter. The value of K for sorbic acid, HC,H,O, is 1.7 × 105. a. Write the net-ionic equation for the reaction between KC H,0,(aq) and HCl(aq). b. A total of 29.95 mL of 1.25 M HCl(aq) is required to reach the equivalence point. Calculate the number of moles of H* added. c. Write the equation by which sorbic acid dissolves in water. d. Write the K, expression for sorbic acid dissolving in water. e. Calculate the pH of a 0.750M solution of sorbic acid.
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