Which of the following correctly represents the chemical formula of a compound formed by aluminium and sulphate ions?
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A.
Al₃(SO₄)₂
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B.
Al₂SO₄
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C.
Al(SO₄)₃
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D.
Al₂(SO₄)₃
Correct Answer:
D. Al₂(SO₄)₃
Explanation:
The chemical formula for the compound formed by aluminum and sulfate ions is Al2(SO4)3. This is determined by balancing the charges of the individual ions to create a neutral compound. Aluminum (Al) forms a cation with a +3 charge, while the sulfate (SO4) polyatomic anion carries a -2 charge. To achieve a net charge of zero, two aluminum ions (total +6 charge) must combine with three sulfate ions (total -6 charge), resulting in the formula Al2(SO4)3.
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