You Want to Maintain PH = 7

question 80

Multiple Choice

You want to maintain pH = 7.0 for an enzyme-catalyzed reaction that will produce hydrogen ions along with the desired product. At equal concentrations, which weak acid, if any, will serve as the better buffer for the reaction: acid A, with pK_a = 6.5, or acid B, with pK_a = 7.5?

• A) acid A
• B) Water is as good as either of the acids available.
• C) acid B
• D) Both are equally effective.

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