The generic metal hydroxide M(OH)2 has Ksp = 3.05×10−18. (NOTE: In this particular problem, because of the magnitude of the Ksp and the stoichiometry of the compound, the contribution of OH− from water can be ignored. However, this may not always be the case.)
Part A
What is the solubility of M(OH)2 in pure water?

Part B
What is the solubility of M(OH)2 in a 0.202 M solution of M(NO3)2?

Question

The generic metal hydroxide M(OH)2 has Ksp = 3.05×10−18. (NOTE: In this particular problem, because of the magnitude of the Ksp and the stoichiometry of the compound, the contribution of OH− from water can be ignored. However, this may not always be the case.)
Part A
What is the solubility of M(OH)2 in pure water?

Part B
What is the solubility of M(OH)2 in a 0.202 M solution of M(NO3)2?

aaronq · Answer

Start by writing the dissociation reaction and the corresponding Ksp equation