Question

Both temporary and permanent hardness of water is removed by

Answer 1

washing soda
hope it helps u

Answer 2

Explanation:

By the addition of washing soda, we can remove both temporary as well as permanent hardness from water. Bicarbonate salts as well as sulphate and chloride salts undergo double displacement reaction with sodium carbonate. In these reaction, the insoluble carbonates formed gets precipitated and are removed by filtration.