Question

Do basic compounds produce OH- ions when dissolved in water?

Answer 1

Not necessarily.

Explanation:

But they all accept protons `H^+` easily. The soluable bases may give off `OH^-` ions, or - in the case of basic oxides - they may accept a proton from the water equilibrium `H_2OrightleftharpoonsH^+ +OH^-`

In both cases `OH^-` will be formed.

Non-soluable bases will need an acid to react, no `OH^-` is formed.