Select the correct formula of Aluminium Sulphate.
Al2(SO4)3
Aluminium forms the Al3+ ion and the sulphate ion is SO42-.
To balance the charges, the positive charge from two aluminium ions (2 × 3 = 6) must equal the negative charge from three sulphate ions (3 × 2 = 6).
This gives two Al and three SO4 groups, so the formula is Al2(SO4)3.
Hence, the correct formula of Aluminium Sulphate is Al2(SO4)3.
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