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A solution of MgCl(2) in water has pH...

A solution of `MgCl_(2)` in water has pH

A

`lt7`

B

`gt7`

C

7

D

14.2

Text Solution

Verified by Experts

The correct Answer is:
A
`MgCl_(2)` is a salt of weak base `[Mg(OH)_(2)]` and strong acid (HCl). Therefore, it undergoes cationic hydrolysis to give an acidic solution having `pHlt7`.
`Mg^(2+)+2H-OHrarrMh(OH)_(2)+2H^(+)`
Magnesium hydroxide is almost completely insoluble in water.
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