What Is the PH of a Buffer Solution That Is $K _ { a }$

question 31

Multiple Choice

What is the pH of a buffer solution that is 0.251 mol L^-1 in lactic acid and 0.151 mol L^-1 in sodium lactate? The $K _ { a }$ of lactic acid is 1.4 × $10 ^ { - 4 }$ .

• A)12.58
• B)5.28
• C)4.08
• D)10.37
• E)3.63

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