Question

The solubility of silver sulfate is 4.7 g/L. What is the Ksp of silver sulfate? Please see Molar Solubility and Ksp for assistance. 402

Answer 1

Solution:

Molar solubility = Solubility in g L-1 / Molar mass

Molar mass of silver sulphate (Ag2SO4)= 311.80 g/mol

Therefore, molar solubility = 4.7 g L-1 / 311.80 g mol-1

=0.01507 mol /L = 0.01507 M

Ag2SO4 is dissociated as,

Ag2SO4 = 2Ag+ + SO4^2-

Ksp = ( 2S)^2 x S =4S^3

Ksp = 4 x (0.01057)^3

Ksp = 4.64 x 10^-6