All the water available on earth is not potable. Potable water is translucent, colorless, odorless and has a flavorful liquid due to dissolution of some salts and gases. If there is no inaccuracy in it, then pure water is tasteless.
But the water from the lake, river, wells and other sources is not pure. It contains some unwanted substances and also contains some harmful microorganisms. Now the question arises how to purify such impure water? For this we adopt many methods.
1. Distillation method
Distillation is the process by which water purification can be done easily. Take some quantity of water in a bowl and heat it to its boiling point. The bacteria and germs present in water are destroyed on heating and water gets converted into vapor. Oil particles unsettled in water and dissolved mineral salts remain in the cup. When this water vapor passes through a condensate tube filled with cold water, it condenses and becomes pure water.
Distilled water is pure water. It is used in medicine making, laboratory solutions and car batteries. Being tasteless, it cannot be used for drinking.
Filtration is separating dissolved impurities such as dust mites, sand, plant residues etc. from water. A special method of filtering (separating) them is by laying layers of charcoal, coarsely-grained sand and some pebbles in a vessel and pouring the dirty water in it. There is a hole in the bottom of this pot, in which cotton is placed. If the water passes through these layers and comes out through the sand in the hole, then the above mentioned impurities remain in these layers and clean water comes out, which is filled in another vessel. This water is either boiled or chlorinated to make it bacteria free.
To chlorine the water, chlorine tablets are added to the water. Chlorine destroys almost all microbes. Sometimes there is some smell coming from your tap water. It is caused by chlorination of this water. The water in the Swimming pool is usually treated by chlorination.
4. Mixing Potassium Permanganate
Have you noticed that sometimes To purify the water of the wells, pink colored crystals of potassium permanganate are added to it. When potassium permanganate dissolves in well water, a merger of potassium permanganate is formed in water, which kills almost all germs and thus the water becomes bacteria free.