# Question #14d2b

##### 1 Answer

From this site we learn that for zinc hydroxide,

#### Explanation:

How did they know this? How else but by measurement? The

So we write out the solubility equilibrium:

So, here,

## Given the equilibrium expression, we call the solubility of #Zn(OH)_2# , #S# .

Thus

So we have a cubic to solve:

To get a gram solubility, we simply multiply this by the molecular mass,

But we are not finished yet. We were asked to find the

Clearly,

And thus

And

Does this value of