Question

what do you mean by hardness of water how can you purify it​

Answer 1

Too much of salt content in water.

boiling,using washing soda

hope it hels

Answer 2

When water cantains salt of calcium and magnesium in disolve state , the water is said said to be hard . We can purify it by adding mixture of washing soda.

hope it will help you. ☆ ☆ ☆ ☆