Question

Suppose sodium hydroxide is added to a 0.0016 M solution of zinc nitrate such that the pH of the solution is 13.42. What is the equilibrium concentration of Zn2+?
Zn2+(aq) + 4OH-(aq) Zn(OH)42-(aq); Kf= 2.8 x1015
A) 2.2 x10-18M
B) 1.6 x10-3M
C) 6.6 x10-2M
D) 1.2 x10-16M
E) 2.2 x10-18M

Answer

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