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What is the correct chemical formula for potash alum (commonly known as alum)?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1Na2SO4 . Al2(SO4)3 . 12H2O
2FeSO4 . Al2(SO4)3 . 24H2O
3K2SO4 . Al2(SO4)3 . 24H2O✓
4K2SO4 . Cr2(SO4)3 . 24H2O

Correct answer

K2SO4 . Al2(SO4)3 . 24H2O

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