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Which ions can be tested in a solution o...

Which ions can be tested in a solution of Mohr's salt?

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Composition of Mohr.s salt is `FeSO_(4) (NH_(4))_(2)SO_(4).6H_(2)O`. It is a double salt. It undergoes complete ionisation when dissolved in water.
Thus its aqueous solution gives test for `Fe^(2+), NH_(4)^(+)` and `SO_(4)^(2-)` ions.
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