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Potash Alum is

(a) $K_2SO_4.Al_2(SO_4)_3.24H_2O$
(b) $K_2SO_4.Al_2(SO_4)_3.18H_2O$
(c) $(NH_4)_2SO_4.K_2SO_4.24H_2O$
(d) None of these

2 Answers

Answer: $K_2SO_4.Al_2(SO_4)_3.24H_2O$

Potash Alum has the chemical formula $K_2SO_4.Al_2(SO_4)_3.24H_2O$

answered Jan 24, 2014 by mosymeow_1
Alum is a series of double sulphate salts of monovalent cations and trivalent cations containing 24 molecules of water of crystallization.
If alum contains aluminium then it is named with monovalent cation.
For example: $K_2SO_4.Al_2(SO_4)_3.24H_2O$
answered Oct 26, 2017 by sharmaaparna1