The refining of the impure salt involve filtration of the water solution and the purification by repeated processes of crystallization/recrystallization.
The pure form of water is distilled water, which has been purified to remove impurities such as minerals, salts, and contaminants. Impure water can contain various substances like minerals, microorganisms, chemicals, and pollutants, making it unsafe for consumption. The presence of impurities in water can affect its taste, smell, and overall quality, making it essential to purify water for various uses.
You can buy special water filters that will make impure water suitable to be drunk without having to boil the water first or the need to add chemicals. I have seen such a device used in a very isolated Youth Hostel Association hostel. So a search on the internet should produce available products.
a method of separation purify water
Then a muslim should clean that place with soap and water or do obligation!
In Islam, it is recommended to wash the body part that touched the dog with water and soil to purify oneself. This is because dogs are considered impure in Islamic teachings.
An unhealthy or impure water supply is contaminated.
An impure substance contain impurities; for example polluted water is an impure substance.
It takes a while to purify water
Pure water does not contain colour but impure water contains Other compounds.
I put a tablet in the cup of creek water to purify it.
in short, crtstallisation is the method that is used to purify the substance.crude product is an impure substance.so,if we want to purify a substance then we have to use crystallisation process.therefore there is a need to crystallise a crude product.