An element "X" of valency 3 forms oxide with chemical formula X2O3. Find:
(i) the ions present in the compound.
(ii) the chemical formula of its chloride.
(iii) the chemical formula of its sulphide.
[5 Marks]
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Solution
(i) Given that the chemical formula of oxide containing element X is X2O3 and the valency of X is 3.
Thus, the ions present in the compound are : X3+ and O2−