Calculate the pH of the solution resulting from the addition of 75.0 mL of 0.15 M KOH to 35.0 mL of 0.20 M HCN (Ka (HCN) = 4.9 * 10-10) .
A) 9.31
B) 9.18
C) 9.52
D) 11.63
E) 12.59
Correct Answer:
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