Suggest the method of separation of pure potash alum from impure potash alum
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Purification of Potash Alum by Crystallization - Olabs - Amrita university
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Purification of Potash Alum by Crystallization
Potash alum is a double salt of potassium sulphate and aluminium sulphate. We can make
pure crystals of potash alum by the process called crystallization. In this process, crystals
of the pure substance are formed by cooling a hot saturated solution of an impure sample.
The different steps involved in the crystallization process are:
Preparation of solution of the impure sample Filtration of the solution
Concentration of the filtrate Cooling the concentrated solution
Separation and drying of crystals
Our aim is to prepare crystals of pure potash alum from the crude sample.