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Coordination Compounds

Question
CBSEENCH12007502

What type of isomerism is exhibited by the following pair:
[Co(NH3)5Br]SO4 and [Co(NH3)SO4] Br
Give a chemical test to distinguish them.

Solution

[Co(NH3)5Br]SO4 and [Co(NH3)SO4] Br exhibit Ionisation isomers.

Above two can be distinguished by chemical test such that  [Co(NH3)5(SO4)]Br  react with silver ion to precipitate silver bromide, AgBr whereas [Co(NH3)5Br]SO4 does not react with silver ion as a bromide is bonded to cobalt and hence not free to react.