Group 16 Elements

In aqueous solutions, copper(I) chloride (Cu Cl ) is more stable than copper(II) chloride (CuCl ) due to the nature of copper ions and their oxidation states. Copper(I) chloride, in the form of Cu Cl , is relatively stable because it tends to remain in the +1 oxidation state, whereas CuCl , which contains copper in the +2 oxidation state, is less stable in aqueous medium due to the instability of copper(II) ions in water.

Thus, Cu Cl is more stable than CuCl in aqueous medium.