What is the pH of a 1.0L solution of 0.445 M hydrocyanic acid, HCN, after 0.191 mol of potassium cyanide, KCN, is added? (Ka of HCN = 4.0 x 10-10)
a. 9.031
b. 9.125
c. 9.750
d. 9.765
e. 10.117
Answer: A
Chemistry
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