Prepare crystals of alum. Topic: Physical and Chemical Changes
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To prepare crystals of alum it is important to take a beaker half-filled with water.
The water needs to be heated to the boiling point temperature.
It is required to add impure alum in the boiled water.
The process of mixing alum powder should be continued until the substance stops dissolving.
It is required to filter the hot solution.
By hanging a small alum crystal in the hot alum solution a large alum crystal can be prepared.
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