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Equimolar solutions of the following wer...

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

A

`SrCl_(2)`

B

`BaCl_(2)`

C

`MgCl_(2)`

D

`CaCl_(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
All alkaline earth metal chlorides `(MCl_(2))` on hydrolysis will produce acidic solution because the base formed , M `(OH)_(2)`, is weak and acid formed (HCl) is strong. However, as we go down the group, basic character of hydroxides increases. Hence, acidic character decreases, i.e., pH increases (though it is `lt 7` in all cases ). Therefore, `BaCl_(2)` solution will have the highest pH .
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