Question
Give evidence that [Co(NH3)5Cl]SO4 and [Co(NH3)5SO4]Cl are ionisation isomers.
✓
Answer
The ionisation isomers dissolve in water to yield different ions and thus react differently to various reagents:
[Co(NH3)5Cl]SO4 + Ba2+ → BaSO4(s) ↓
[Co(NH3)5SO4]Cl + Ba2+ → No reaction
[Co(NH3)5Cl]SO4 + Ag+ → No reaction
[Co(NH3)5SO4] Cl+ Ag+ → AgCl(s)
[Co(NH3)5Cl]SO4 + Ba2+ → BaSO4(s) ↓
[Co(NH3)5SO4]Cl + Ba2+ → No reaction
[Co(NH3)5Cl]SO4 + Ag+ → No reaction
[Co(NH3)5SO4] Cl+ Ag+ → AgCl(s)
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