Chemistry & Chemical Reactivity
9th Edition
ISBN: 9781133949640
Author: John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher: Cengage Learning
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Chapter 4, Problem 74PS
An unknown solid acid is either citric acid or tartaric acid. To determine which acid you have, you titrate a sample of the solid with aqueous NaOH and from this determine the molar mass of the unknown acid. The appropriate equations are as follows.
Citric acid:
H3C6H5O7(aq) + 3 NaOH(aq) → 3 H2O(l) + Na3C6H5O7(aq)
Tartaric acid:
H2C4H4O6(aq)+ 2 NaOH(aq) → 2 H2O(l) + Na2C4H4O6(aq)
A 0.956-g sample requires 29.1 mL of 0.513 M NaOH to consume the acid completely. What is The unknown acid?
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Chapter 4 Solutions
Chemistry & Chemical Reactivity
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Ch. 4.4 - A 0509-g sample of an unknown organic compound...Ch. 4.5 - Sodium bicarbonate, NaHCO3, is used in baking...Ch. 4.5 - An experiment calls for you to use 250. mL of 1.00...Ch. 4.5 - 1. A 1.71-g sample of Ba(OH)2(s) was dissolved in...Ch. 4.5 - Prob. 2RCCh. 4.5 - 3. What volume of 0.250 M KMnO4(aq) contains 0.500...Ch. 4.6 - (a) What is the pH of a solution of HCI in which...Ch. 4.6 - Which of the solutions listed below has the lowest...Ch. 4.6 - A 0.365-g sample of HCl is dissolved in enough...Ch. 4.6 - 3. A solution has a pH of 10.54. What is the...Ch. 4.7 - Prob. 1CYUCh. 4.7 - A 25.0-mL sample of vinegar (which contains the...Ch. 4.7 - Hydrochloric acid. 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Using a...Ch. 4 - Prob. 54PSCh. 4 - A table wine has a pH of 3.40. 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