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A volume of 12.5 mL of 0.05 M SeO(2) rea...

A volume of 12.5 mL of 0.05 M `SeO_(2)` reacts with 25 mL of 0.1 M `CrSO_(4)` which is oxidised to `Cr^(3+)`. To what oxidation state was the selenium converted by the reaction ?

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