# Problem: Consider an amphoteric hydroxide, M(OH)2(s), where M is a generic metal.M(OH)2 (s) ⇌ M2+ (aq) + 2OH- (aq)     Ksp = 2 x 10-16M(OH)2 (s) + 2OH- (aq) ⇌ M(OH)42- (aq)    Kf = 0.060Estimate the solubility of M(OH)2 in a solution buffered at pH = 7.0, 10.0, and 14.0.

###### FREE Expert Solution
89% (102 ratings)
###### FREE Expert Solution

M(OH)2 (s) ⇌ M2+ (aq) + 2OH- (aq)

From this balanced equation we can see that equilibrium expression for Ksp:

Ksp= [M2][OH-]22 = 2 x 10-16

This is so because we have 1 mole of M(OH)2 producing 1 mole of M2+ and 2 moles of OH-.

We are looking for Molar solubility, or x. In our equation, [M2] = x, so we need to solve for  [M2].

89% (102 ratings) ###### Problem Details

Consider an amphoteric hydroxide, M(OH)2(s), where M is a generic metal.

M(OH)2 (s) ⇌ M2+ (aq) + 2OH- (aq)     Ksp = 2 x 10-16

M(OH)2 (s) + 2OH- (aq) ⇌ M(OH)42- (aq)    Kf = 0.060

Estimate the solubility of M(OH)2 in a solution buffered at pH = 7.0, 10.0, and 14.0.

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Ksp concept. You can view video lessons to learn Ksp. Or if you need more Ksp practice, you can also practice Ksp practice problems.

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Based on our data, we think this problem is relevant for Professor Carlon's class at UCB.