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Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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You want to prepare 100.0 mL of a buffer solution with a pH of 4.95 by mixing appropriate volumes of 0.10 M CH3CO2H and 0.10 M NaCH3CO2. How many milliliters (mL) of the acetic acid and sodium acetate solution are needed? (CH3CO2H has Ka = 1.8 x 10–5)
(A) 75.0 mL of 0.10 M CH3CO2H + 25.0 mL of 0.10 M NaCH3CO2;
(B) 62.0 mL of 0.10 M CH3CO2H + 38.0 mL of 0.10 M NaCH3CO2;
(C) 38.0 mL of 0.10 M CH3CO2H + 62.0 mL of 0.10 M NaCH3CO2;
(D) 25.0 mL of 0.10 M CH3CO2H + 75.0 mL of 0.10 M NaCH3CO2;
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