Give evidence that `[Co(NH_3)_5Cl]SO_4` and `[Co(NH_3)_5SO_4]Cl` are ionisation isomers.

Explanation

The ionisation isomers dissolve in water to yield different ions and thus
react differently to various reagents:
`[Co(NH_(3))_(5)Br]SO_(4) + Ba^(2+) rarr BaSO_(4)` (s)

`[Co(NH_(3))_(5)SO_(4)]Br + Ba^(2+) rarr "No reaction"`

`[Co(NH_(3))_(5)Br]SO_(4) + Ag^(+) rarr "No reaction"`

`[Co(NH_(3))_(5)SO_(4)]Br + Ag^(+) rarr AgBr (s)`