Consider an amphoteric hydroxide, M ( OH ) 2 ( s ) , where M is a generic metal. M ( OH ) 2 ( s ) − ⇀ ↽ − M 2 + ( aq ) + 2 OH − ( aq ) K s p = 3 × 10 − 16 M ( OH ) 2 ( s ) + 2 OH − ( aq ) − ⇀ ↽ − [ M ( OH ) 4 ] 2 − ( aq ) K f = 0.04 Estimate the solubility of M ( OH ) 2 in a solution buffered at pH = 7.0, 10.0, and 14.0.