Chemistry - Complete s-block Question with Solution | TestHub

Hardness of water is due to the presence of bicarbonates, chlorides and sulphates of$\mathrm{C}\mathrm{a}$and$\mathrm{M}\mathrm{g}$on it. These$\mathrm{C}{\mathrm{a}}^{2+}$and$\mathrm{M}{\mathrm{g}}^{2+}$ions react with the anions of fatty acids present in soaps to form curdy white precipitates. As a result, hard water does not produce lather with soap immediately.