Ksp: Calculate from Solubility (mol/L)

Question

A student measures the CN^- concentration in a saturated aqueous solution of silver cyanide to be 1.14×10^-8 M.

Based on her data, the solubility product constant for silver cyanide is ______.

Answer 1

AgCN(s) <===> Ag⁺(aq) + CN^-(aq)

[Ag⁺] = [CN^-] = 1.14x10^-8 M

Ksp = [Ag⁺][CN^-] = (1.14x10-8)²

Ksp = 1.3x10^-16