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Answer the following.
What type of isomers are and ? Give a chemical test to distinguish between the two isomers.
What type of isomers are $[\text{Co}(\text{NH}_3)_5\text{Br}]\text{SO}_4$ and $[\text{Co}(\text{NH}_3)_5\text{SO}_4]\text{Br}$? Give a chemical test to distinguish between the two isomers.
Answer
Answer
AIThey are ionisation isomers.
Test: add aqueous $\mathrm{BaCl_2}$ solution. $[\mathrm{Co(NH_3)_5Br}]\mathrm{SO_4}$ gives a white precipitate of $\mathrm{BaSO_4}$ (free $\mathrm{SO_4^{2-}}$), while $[\mathrm{Co(NH_3)_5SO_4}]\mathrm{Br}$ gives none (it gives a pale yellow precipitate of AgBr with $\mathrm{AgNO_3}$ instead).
From ISC 2018 Specimen Chemistry Paper 1, question 12(a).
Check your working with the Coordination complex analyser: hybridisation, shape, magnetic moment, CFSE, isomers and the IUPAC name of a complex.