Give evidence that [Co(NH3)5Cl]SO4 and [Co(NH3)5SO4]Cl are ionization isomers.

When ionization isomers are dissolved in water, they ionize to give different ions. These ions then react differently with different reagents to give different products. First will give white ppt with BaSO4 and no raection with AgNO3. Second will give white ppt with AgCl and no raection with BaSO4.