Which of the Following Acids Would You Use to Make

question 18

Multiple Choice

Which of the following acids would you use to make an effective buffer for a reaction at pH 8?

• A) Ethanoic acid; K_a = 1.7  10^-5
• B) Diphosphoric acid; K_a = 1.4  10^-7
• C) Tris-hydroxmethylaminoethane; K_a = 8.3  10^-9
• D) Ammonium chloride; K_a = 5.6  10^-10
• E) Sodium bicarbonate; K_a = 5.3  10^-11

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