Question

How do you set up a Ksp equation?

Answer 1

See this old answer.

Explanation:

The answer deals with the solubility of `PbCl_2`.

`PbCl_2(s) rightleftharpoons Pb^(2+) + 2X^(-)`

`K_"sp"` `=` `[Pb^(2+)][Cl^-]^2`

You become very familiar with these sorts of expressions.