Question

Which method is suitable to remove Hardness of water at home?

Answer 1

1. The presence of salts of Calcium and Magnesium makes the water hard.
2. The hardness of water is of two types - Permanent hardness and Temporary hardness.
3. We can remove the temporary hardness of water at home by boiling it.
4. During boiling, soluble salts of $\mathrm{Mg}{\left({\mathrm{HCO}}_3\right)}_2$ get converted into ${\mathrm{MgCO}}_3$ (insoluble salts) which get precipitated and can easily remove. $$\begin{gathered} \mathrm{Mg}{\left({\mathrm{HCO}}_3\right)}_2\left(\mathrm{aq}\right)\to {\mathrm{MgCO}}_3\left(\mathrm{aq}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+{\mathrm{CO}}_2\left(\mathrm{g}\right) \\ \mathrm{Magnesium}\mathrm{Magnesium} \\ \mathrm{Bicarbonate}\mathrm{carbonate} \end{gathered}$$
5. Boiling is the method that is suitable to remove the hardness of water at home.