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A crystalline salt on being rendered anh...

A crystalline salt on being rendered anhydrous loses 45.6% of its mass. The percentage composition of anhydrous salt is Al = 10.5%, K = 15.1 %, S = 24.8% and I = 49.6%.
Calculate the simplest formula of anhydrous salt and the crystalline salt. (Al= 27, K = 39, S = 32, I= 127)

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[Anhydrous =-`AIK(SO_(4))_(2)` Hydrated = `AIK(SO_4)_(2).28H_(2)O`]
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