For each of these substances, calculate the molarity of metallic ion that can remain at equilibrium in a solution having a [OH-] -1.0 x 10-4 M. Comment on your findings.
a. Cu(OH)₂ Ksp = 1.6 x 10⁻⁹
b. Fe(OH)₃, Ksp = 6.0 x 10⁻³⁸.