The acid-dissociation constant of hydrocyanic acid (HCN) at 25.0 °C is 4.9 × 10-10. What is the pH of an aqueous solution of 0.050 M sodium cyanide (NaCN) ?
A) 11.00
B) 3.00
C) 1.0 × 10-3
D) 9.9 × 10-12
E) 2.5 × 10-11
Correct Answer:
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