Question

Why does a soluble metal salt reacts with NaOH/KOH to produce salt and insoluble metal hydroxide?

Answer 1

Because most metal hydroxides are INSOLUBLE...........

Explanation:

Alkali metal hydroxides tend to be soluble........

When mixed with soluble metal salts, for instance halides or nitrates, which are generally soluble, the hydroxide salt comes a crashing out of solution:

`M^(2+) + 2HO^(-) rarr M(OH)_2(s)darr`

For example, `M=Pb, Ni, Fe, Mn, Cr`