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How do you distinguish between the following pairs of isomers? [Cr(NH_(3))_(5)Br]CI and [Cr(NH_(3))_(5)CI]Br [CO(NH_(3))_(6)][Cr(NO_(2))_(6)] and [Cr(NH_(3))_(6)] [CO(NO_(2))_(6)] |
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Answer» Solution :The isomers can be distinguished by using `AgNO_(3)` reagent. One gives curdyprecipitate of AgCl soluble in ammonia while the other will form light yellow precipitate of AgBr partly soluble in ammonia (II) The isomers can be distinguished by passing their aq. solutions through a cation exchanger. In the isomer `[CO(NH_(3))_(6)] [Cr(NO_(2))_(6)]`, the cation `[CO(NH_(3))_(6)]6(3+)` will be REPLACED by `H^(+)` ions from the resin. The resulting solution will THUS CONTAIN `H_(3) [Cr(NO_(2))]`In the other case, the resulting solulion after PASSAGE through the exchanger will contain `H_(3) [Co(NO_(2))_(6)]`. On adding KCl solution, `[CO(NO_(2))_(6)]^(3+)` ion will give an yellow precipitate of potassium cobaltinitrate, `K_(3)[CO(NO_(2))_(6)]` Hence, the resulting solutions obtained from the two isomers can be distinguished. |
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