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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