Question

Write the properties and uses of the alum?​

Answer 1

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Uses of Alum

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)

deodorant "rock"

pickling agent to help keep pickles crisp.

flame retardant.

the acidic component of some types of baking powder.

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Answer 2

Introduction of Alum-

• It's general formula is

$\bold{M_{2}SO_{4}.M'_{2}(SO_{4})_{3}.24H_{2}O}$

where,

M is the Monovalent Radical

M' is trivalent radical

• Ion of each metal is teared by 6 molecules of water.

• It is the sulphate which is double of salt.

Properties of Alum-

• It is highly soluble in water and is white crystalline solid.

• Dehydration occurs on heating.

• It swells up after heating.

• In aqueous solution it's very acidic.

Uses of Alum-

• It is generally used to stop bleeding.

• Also used for the purification of water.