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14.6 Exercise 4

Avg difficulty 2.5

What is [H3O+] in a solution of 0.25 M CH3CO2H and 0.030 M NaCH3CO2?
CH3CO2H(aq)+H2O(l)⇌H3O+(aq)+CH3CO2−(aq)Ka=1.8×10−5\text{CH}_{3} \text{CO}_{2} \text{H} \left(a q\right) + \text{H}_{2} \text{O} \left(l\right) \rightleftharpoons \text{H}_{3} \text{O}^{+} \left(a q\right) + \text{CH}_{3} \text{CO}_{2} ^{−} \left(a q\right) K_{\text{a}} = 1.8 \times 10^{−5}

OpenStax Chemistry 2e, 14.6 Buffers, exercise 4

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Adapted from General Chemistry © 2019 Rice University. Licensed under CC BY 4.0. Sources: Chemistry 2e, Chemistry: Atoms First 2e. Imported at revision 32c7196.