If and occur together in aqueous solution

CHEMISTRY · Multi correct · A Level · Chemistry · Group 7 elements (halogens) · Group 7 elements (halogens)

Problem

If Br−\text{Br}^- and I−\text{I}^- occur together in aqueous solution, then excess Cl2(aq)\text{Cl}_2(\text{aq}) can (a) Oxidise Br−\text{Br}^- to Br2\text{Br}_2, which can be extracted with CS2\text{CS}_2. (b) Oxidise I−\text{I}^- to I2\text{I}_2, which can be extracted with CS2\text{CS}_2. (c) Oxidise Br−\text{Br}^- to BrO3−\text{BrO}_3^-. (d) Oxidise I−\text{I}^- to IO3−\text{IO}_3^-.

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