Hydrocyanic acid, HCN, is a weak acid with Ka = 4.9 × 10–10. Nickel(II) ion complexes strongly with — Equilibrium Chemistry Question
Question
Hydrocyanic acid, HCN, is a weak acid with Ka = 4.9 × 10–10. Nickel(II) ion complexes strongly with cyanide ion to form Ni(CN)4 2–, Kf = 1.0 × 10^22. What is the pH of 1.00 L of a 0.100 M solution of HCN to which 0.025 mol NiCl2 has been added?
A.
1.00
B.✓ Correct
4.05
C.
5.15
D.
8.92
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