Question

How is water purified for drinking and scientific purposes?

Answer 1

Purification of water for drinking purposes:

• Natural water present in rivers or lakes is brought to waterworks using canals and pipes.
• In Waterworks, the mixing of water with alum, soda, and lime solutions takes place.
• This results in the formation of aluminum hydroxide, a jelly-like, sticky solid.
• The water is then sent to the settling tank.
• As the name of the tank suggest the impurities are going to settle down in this tank.
• The settle-down impurities can be separated.
• The water still contains some type of impurities.
• Therefore this water is passed through filters of boulders, gravel, coarse sand, and fine sand in a successive manner.
• Water obtained after this successive filtration is chlorinated.
• This water is then allowed for distribution for commercial purposes.

Purification of water for scientific purposes:

• Water used for scientific purposes is known as distilled water.
• The distilled water name suggests that scientific water is obtained by repeat distillation of ordinary water.