- MnS: Ksp = 2.5 x 10-10
- Fe(OH)2: Ksp = 8 x 10-16
- Mg3(AsO4)2: Ksp = 2 x 10-20 2.
Using the Ksp values given in the problem above determine the concentration of: a. Mn+2 in a 0.2 M solution of Na2S (a soluble salt) b. Fe+2 in a solution that is 0.2M in NaOH (a soluble salt) c. Mg+2 in a solution that is 0.2 M in Na3AsO4 (a soluble salt)