CU{{I}_{2}}}}\,+{{K}_{2}}S{{O}_{4}}\] \[2Cu{{I}_{2}}\to C{{u}_{2}}{{I}_{2}}+{{I}_{2}}\] Hence, solution CONTAINS \[C{{u}_{2}}{{I}_{2}},{{I}_{2}}\] and \[{{K}_{2}}S{{O}_{4}}\].