A coordinate complex contains Co ³⁺, Cl ⁻ and NH ₃ . When dissolved in water, one mole of this complex gave a total of 3 moles of ions. The complex is

Step-by-step solution

When the complex dissolved in water, it gives three ions, which shows that two Cl ⁻ ions are present outside the coordination sphere. The formula of the complex is aligned & [ Co ( NH ₃ )₅ Cl ] Cl ₂ & [ Co ( NH ₃ )₅ Cl ] Cl ₂ Water [ Co ( NH ₃ )₅ Cl ²⁺+2 Cl ⁻ . _ 3 ion aligned