Give difference between hard water and soft water.

Solution-:

HARD WATER-:

1) Water, which does not produce lather with soap solution readily, but forms a white curd, is called "hard water" .

2) Hard water contains dissolved calcium and magnesium salts in it.

3) In hard water, cleansing quality of soap is depressed and a lot of it is wasted during washing and bathing.

4) Due to the presence of dissolved hardness producing salts, the boiling point of water is elevated. Consequently, more fuel and time are required for cooking.

SOFT WATER-:

1) Water, which lathers easily on shaking with soap solution , is called "Soft water" .

2) Soft water does not contain dissolved calcium and magnesium salts in it.

3) In soft water, cleansing quality of soap is not depressed and so soap is not wasted during washing and bathing.

4) Less fuel and are required for cooking in soft water.