Separation of Substances

Why we do separation?

• To remove impurity or harmful substances
• To separate two useful substances

Methods of Separation:

• Handpicking: 
• It is separated by Hand and can be used to separate larger sized impurity like a stone from foodgrains.
• Threshing: 
• The process that used to separate grains from stalks is Threshing.
• Winnowing: 
• It is used to separate heavier & lighter components of a mixture by wind or by blowing air.
• Sieving: 
• Sieving allows the fine flour particle to pass through the holes of sieves while bigger impurities remain in the sieve.
• Sedimentation
• Heavier components in mixture settle after water is added to it, which is called sedimentation.
• Decantation
• When the water along with the dust is removed from the mixture, is called decantation
• Filtration:
• Tea leaves(insoluble solid) are separated from liquid with Strainer, this process is called filtration.
• Evaporation: 
•  It is the process in which liquid(i.e water) gets converted into its vapor is called evaporation. 
• This method used to separate the solid dissolved in liquid. 
• Condensation: 
• The process of conversion of gases( water vapor) into liquid is called condensation 
• Saturated: 
• It is the condition when no more substance( i.e salt or sugar ) can be dissolved in solution(i.e water). The solution is called a saturated solution. 
• More substances can be dissolved in a solution by heating it.

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