Question

What is the solubility of copper(II) hydroxide in sodium hydroxide solution?

Answer 1

No, `pH` is determined by measurement, and solely by measurement. However, it is probable that even `"cupric hydroxide"`, will have some solubility, enuff to elevate `pH` ABOVE `7`.

Explanation:

`CuSO_4(aq) + 2NaOH(aq) rarr Cu(OH)_2(s)darr + 2NaCl(aq)`

Your reaction does not include the correct states of the reactants, `"cupric hydroxide"` is quite insoluble in aqueous solution? `K_"sp"` `(Cu(OH)_2)=1.722xx10^-6` at `20` `""^@C` according to this table.

How do we use the `K_"sp"` value to give a solubility in `g*L^-1`?