Question

Calculate the equilibrium concentration of Ag+ (aq) in a solution that is initially 0.200 M AgNO3 and 0.800 M KCN. The formation constant for [Ag(CN)2]- (aq) is Kf = 1.0 x 10^21 *PLEASE SHOW ICE TABLE AS WELL, THANKS!!!*

Answer 1

Initial (M)	0.200	0.800	0
Change (M)	-x	-2x	x
Equilibrium (M)	0.200-x	0.800-2x	x

The formation constant

On solving this polynomial equation we get x =0.2-1 \times 10^{-16}

Hence, the equilibrium concentration of silver ion is