what is alum used for?
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Answer:alum is used to purify the water and it is also used to stop bleeding from any cuts in the body
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Usually, when you hear about alum it is in reference to potassium alum, which is the hydrated form of potassium aluminum sulfate and has the chemical formula KAl(SO4)2·12H2O. However, any of the compounds with the empirical formula AB(SO4)2·12H2O are considered to be an alum. Sometimes alum is seen in its crystalline form, although it is most often sold as a powder. Potassium alum is a fine white powder that you can find sold with kitchen spices or pickling ingredients. It is also sold as a large crystal as a "deodorant rock" for underarm use.
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