What are alums? Give two uses of alum.
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Answer:
a colourless astringent compound which is a hydrated double sulphate of aluminium and potassium, used in solution in dyeing and tanning.
any of a number of analogous crystalline
purification of drinking water as a chemical flocculant.
in styptic pencil to stop bleeding from minor cuts.
the adjuvant in vaccines ( a chemical that enhances the immune response
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Explanation:
An alum is a type of chemical compound, usually a hydrated double sulfate salt of aluminium with the general formula XAl ₂·12H ₂O, where X is a monovalent cation such as potassium or ammonium. By itself, "alum" often refers to potassium alum, with the formula KAl ₂·12H ₂O.
The two uses of alum are:-
- purification of drinking water as a chemical flocculant.
- in styptic pencil to stop bleeding from minor cuts.
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