Find the incorrect matches from the following(i) Copper (II) bromide → CuBr2(ii) Aluminium (III) nitrate → Al(NO3)2(iii) Calcium (II) phosphate → Ca3(PO2)4(iv) Iron (III) sulphide → FeS3(v) Magnesium (II) acetate → Mg (CH3COO)2
Question
Find the incorrect matches from the following(i) Copper (II) bromide → CuBr2(ii) Aluminium (III) nitrate → Al(NO3)2(iii) Calcium (II) phosphate → Ca3(PO2)4(iv) Iron (III) sulphide → FeS3(v) Magnesium (II) acetate → Mg (CH3COO)2
Solution
The incorrect matches from the following are:
(iii) Calcium (II) phosphate → Ca3(PO2)4 The correct formula for Calcium (II) phosphate is Ca3(PO4)2. The charge on the phosphate ion (PO4) is -3 and the charge on the calcium ion is +2. Therefore, to balance the charges, we need 3 calcium ions and 2 phosphate ions.
(iv) Iron (III) sulphide → FeS3 The correct formula for Iron (III) sulphide is Fe2S3. The charge on the sulphide ion (S) is -2 and the charge on the iron ion is +3. Therefore, to balance the charges, we need 2 iron ions and 3 sulphide ions.
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