Question

Equimolar solutions of the following were prepared in water separately. Which one of the solutions will record the highest pH?

(a) MgCl₂ 

(b) CaCl₂

(c) SrCl₂ 

(d) BaCl₂

Answer 1

The correct option is: (d) BaCl₂

Explanation:

Equimolar solutions of the given chlorides when prepared in water forms their respective hydroxides. 

Be(OH)₂ is amphoteric, but the hydroxides of other alkaline earth metals are basic. The basic strength increases down the group. Hence higher the basic character higher will be the pH.