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  4. A solution of MgCl2 in water has pH

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Q. A solution of $MgCl_2$ in water has pH

The s-Block Elements

Solution:

A solution $MgCl_2$ in water is acidic $( pH <7)$ due to hydrolysis.
$MgCl _2+2 H _2 O \longrightarrow Mg ( OH )_2+2 H ^{+}+2 Cl$