【Daily Question】Chemical Analysis Edition, 10.8.2019
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This post was last edited by zjp on 2019-10-8 09:38. Multiple-choice question: To prepare 1 liter of HAc-NaAc buffer solution with a pH of 5.0 using NaAc•3H2O crystals and 2.0 M HAc, which is the correct method? (Ka = 1.8×10-5) A. Dissolve 49 grams of NaAc•3H2O in a small amount of water, then add 50 ml of 2.0 mol/L HAc solution, and dilute with water to 1 liter. B. Dissolve 98 grams of NaAc•3H2O in a small amount of water, then add 50 ml of 2.0 mol/L HAc solution, and dilute with water to 1 liter. C. Dissolve 25 grams of NaAc•3H2O in a small amount of water, then add 100 ml of 2.0 mol/L HAc solution, and dilute with water to 1 liter. D. Dissolve 49 grams of NaAc•3H2O in a small amount of water, then add 100 ml of 2.0 mol/L HAc solution, and dilute with water to 1 liter. D
C. Dissolve 25 grams of NaAc•3H2O in a small amount of water, then add 100 ml of 2.0 mol/L HAc solution, and dilute with water to 1 liter