Cadmium sulfide is bright yellow . Cadmium chloride and cadmium sulfate are colorless solids that dissolve easily in water . Hydrochloric acid , sulfuric acid and nitric acid dissolve cadmium by forming cadmium chloride ( CdCl2 ) cadmium sulfate ( CdSO4 ) or cadmium nitrate ( Cd ( NO3 ) 2 ) .