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    Chemistry The Central Science
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    Exam 16: Acid-Base Equilibria
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    K<sub>a</sub> for HCN Is 4
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Ka for HCN Is 4

Question 119

Question 119

Multiple Choice

Ka for HCN is 4.9 × 10-10. What is the pH of a 0.068 M aqueous solution of sodium cyanide?


A) 0.74
B) 2.96
C) 11.07
D) 13.24
E) 7.00

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