Aluminum Potassium Sulfate (Alum): Formula, Properties & Uses

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The chemical formula for aluminum potassium sulfate is KAl(SO₄)₂·12H₂O.

This is also known as alum, a common name for several double sulfates of the general formula XAl(SO₄)₂·12H₂O, where X is a monovalent cation such as potassium, ammonium, or sodium.

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