1.

Write formulae and names of the various salts formed when magnesium hydroxide is treated with sulphurous acid.

Answer»

Solution :`Mg(OH)_(2)` is a diacidic base and `H_(2)SO_(3)` is a dibasic ACID. HENCE there is possibility of three different salts.
`Mg(OH)_(2) + H_(2)SO_(3) rarr underset("MAGNESIUM hydroxy bisulphite")(Mg(OH)HSO_(3) + H_(2)O)`
`Mg(OH)HSO_(3) + H_(2)SO_(3) rarr underset("Magnesium bisulphite")(Mg(HSO_(3))_(2) + H_(2)O)`
`Mg(OH)_(2) + H_(2)SO_(3) rarr underset("Magnesium bisulphite")(Mg(HSO_(3))_(2) + H_(2)O)`
`Mg(HSO_(3))_(2) + Mg(OH)_(2) rarr underset("Magnesium sulphite")(2MgSO_(3) + 2H_(2)O)`


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