Write a method to separate a mixture of sand and potash alum.

• Mix sand and potash alum thoroughly with water so that potash alum gets dissolved in water.
• Sand, being insoluble in water, will not get dissolved in it.
• On filtering the liquid,  the solid that is left behind will be the sand, and the liquid will be a solution of potash alum.
• Potash alum is re-crystallized by heating the solution gently. In the process, all the water gets evaporated leaving behind potash alum.

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Updated on: 10-Oct-2022

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