Use the following data to calculate the Ksp value for each solid. (a) The solubility of MncO3 is 1.1x 10-3 g/L. (b) The solubility of Al(OH)3 is 5.5x 10-9 mol/L. Solution Ans : a) The dissociation reaction of MnCO3 is given as : MnCO3 = Mn 2+ + CO3 2- Ksp = [Mn 2+ ] [CO3 2- ] putting values : Ksp = (1.1 x 10 -3 ) (1.1 x 10 -3 ) Ksp = 1.21 x 10 -6 b) The dissociation reaction of Al(OH)3 is given as : Al(OH)3 = Al 3+ + 3OH - Ksp = [Al 3+ ] [OH - ] 3 Putting values : Ksp = (5.5 x 10 -9 ) (3 x 5.5 x 10 -9 ) 3 Ksp = 2.47 x 10 -32 .