When excess solid YZ is put in water and allowed to dissolve the following equil

Question

When excess solid YZ is put in water and allowed to dissolve the following equilibrium reaction occurs and the equilibrium table shown can be set up. The amount of solid that dissolves is called the molar solubility denoted here by x. Since the concentration of the solid is constant and is not included in the K_sp expression the equilibrium expression for the reaction is K_sp = [Y][Z], or, in terms of molar solubility K_sp = x^2 Enter the the K_sp expression for the solid AB_2 in terms of the molar solubility

Explanation / Answer

AB2 (s)   <—> A2+ (aq) + 2B- (aq)

                   x           2x

Ksp = [A2+] [B-]^2

= x*(2x)^2

= 4*x^3

Answer: 4x^3

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