The complete reaction is as follows, [Co(H2O)6]Cl3→[Co(H2O)6]3++3Cl− 3Cl−+3AgNO3→3AgCl↓+3NO3− When one mole of CoH12O6Cl3 is treated with excess of AgNO3,3 mole of AgCl are obtained. It means that CoCl3H12O6 on dissociation in aqueous solution, all three chloride ions come in solution.
