Question

Correct order of solubility of sulphate salts in water is

Answer 1

Solubility of the Hydroxides

Magnesium hydroxide appears to be insoluble in water. However, if it is shaken in water and filtered, the solution is slightly basic. ...

Calcium hydroxide solution is referred to as "lime water". ...

Barium hydroxide is soluble enough to produce a solution with a concentration around 0.1 mol dm-3 at room temperature.