Question

$A$ solution of $MgC{l}_2$ in water has $pH$

• A. $<7$
• B. $>7$
• C. $7$
• D. $14.2$

Answer 1

Answer: (A)

$MgC{l}_2$ hydrolyses to give strong acid $HCl,$ hence $pH$ of solution is acidic i.e. $<7;$
$MgC{l}_2+2H_{2}O\to MgO+2HCl+H_{2}O$