`CoSO_(4)Cl.5NH_(3)` exists in two isomeric forms 'A' and 'B'. Isomer 'A' reacts with `AgNO_(3)` to give white precipitate, but does not react with `BaCl_(2)`. Isomer 'B' gives white precipitate with `BaCl_(2)` but does not react with `AgNO_(3)`.
Answer the following questions.
(i) Identify 'A' & 'B' and write their structural formulas.
(ii) Name the type of isomerism involved.
(iii) Give the IUPAC name of 'A' and 'B'.

Explanation

Experimental results suggest that isomer 'A' contains ionisable `Cl^(-)` ion, while isomer 'B' contains ionisable `SO_(4)^(2-)` ion.
`thereforeA-=[Co(NH_(3))_(5)]Cl and B-=[Co(NH_(3))_(5)Cl]SO_(4)`
(ii) Ionisation isomerism.
(iii) `Ararr` pentaamminesulphtocobalt (III) chloride
`Brarr` pentaamminechloridocobalt (III) sulphate