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JAMB Chemistry 2013 Paper

Question : 24

Total: 44

A metal that forms soluble trioxosulphate (IV) ion is

Solution:

Concept:

Trioxosulphate(IV) ion is the sulphite ion,

\mathrm{SO}_3^{2-}

. Sulphites of alkali metals are soluble in water.

Explanation:

Most sulphites are insoluble, but those of the alkali metals, such as potassium, are soluble.

Potassium forms the soluble salt

\mathrm{K}_2\mathrm{SO}_3

Answer:

B. potassium

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