Question

Temporary hardness of water can be removed by ___.

Answer 1

Temporary hardness of water can be removed by boiling. $Ca$($HC{O}_3{)}_2$ is responsible for the temporary hardness of water which can be removed in the form of $CaC{O}_3$ by boiling.

$Ca$($HC{O}_3{)}_2$ $\stackrel{boil}{\to }$ $CaC{O}_3$(insoluble) + $H_{2}O$ + $C{O}_2$