The PK_a of Lactic Acid Is 3

question 20

Multiple Choice

The pK_a of lactic acid is 3.86. What is the pH of a buffer in which the lactic acid concentration is 0.20 M and the sodium lactate concentration is 2.0 M?

• A) 2.86
• B) 3.86
• C) 4.86
• D) 7.00

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