A buffer solution is made such that the initial concentrations of lactic acid (HC3H5O3 ) and the lactate ion (C3H5O3-) are 0.600 M and 0.620 M, respectively.What is the resulting pH if 100.0 mL of 0.100 M potassium hydroxide is added to 0.500 L of the buffer solution? (The Ka of HC3H5O3 is 1.4 * 10-4.)
A) 3.81
B) 3.90
C) 2.75
D) 4.96
E) 3.85
Correct Answer:
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