Consider the following statements regarding potash alum: (i) It is a double salt that dissociates completely into simple ions when dissolved in water. (ii) The ratio of the number of monovalent cations to trivalent cations in its formula unit is 1:1 . (iii) In its anhydrous form, the ratio of the number of oxygen atoms to sulfur atoms is 4:1 . (iv) In one formula unit, the total number of cations is equal to the tota

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The chemical formula of potash alum is K ₂ SO ₄ Al ₂( SO ₄)₃ 24 H ₂ O . Statement (i): Potash alum is a double salt and, unlike coordination complexes, it loses its identity in aqueous solution and dissociates completely into simple ions ( K ^+ , Al ³⁺ , and SO ₄²⁻ ). This statement is correct. Statement (ii): In one formula unit, there are 2 monovalent cations ( K ^+ ) and 2 trivalent cations ( Al ³⁺ ). The ratio is 2:2 , which simplifies to 1:1 . This statement is correct. Statement (iii): The anhydrous part of t