Black or black to brownish black amorphous crystalline powder, slightly hygroscopic, soluble in dilute acid, cyanide alkali or ammonium carbonate solution, slowly soluble in ammonia water, almost insoluble in water and alcohol. Copper oxide can be made in

Black or black to brownish black amorphous crystalline powder, slightly hygroscopic, soluble in dilute acid, cyanide alkali or ammonium carbonate solution, slowly soluble in ammonia water, almost insoluble in water and alcohol. Copper oxide can be made in

Cuprous oxide, molecular formula Cu2O, dark red or brown crystalline powder. It is easy to oxidize in moist air, insoluble in water and alcohol, soluble in hydrochloric acid, ammonium chloride, and ammonia water, and slightly soluble in nitric acid.

Cuprous oxide, molecular formula Cu2O, dark red or brown crystalline powder. It is easy to oxidize in moist air, insoluble in water and alcohol, soluble in hydrochloric acid, ammonium chloride, and ammonia water, and slightly soluble in nitric acid.

Cuprous oxide, molecular formula Cu2O, dark red or brown crystalline powder. It is easy to oxidize in moist air, insoluble in water and alcohol, soluble in hydrochloric acid, ammonium chloride, and ammonia water, and slightly soluble in nitric acid.

Cuprous oxide, molecular formula Cu2O, dark red or brown crystalline powder. It is easy to oxidize in moist air, insoluble in water and alcohol, soluble in hydrochloric acid, ammonium chloride, and ammonia water, and slightly soluble in nitric acid.

Cuprous oxide, molecular formula Cu2O, dark red or brown crystalline powder. It is easy to oxidize in moist air, insoluble in water and alcohol, soluble in hydrochloric acid, ammonium chloride, and ammonia water, and slightly soluble in nitric acid.

Cuprous oxide, molecular formula Cu2O, dark red or brown crystalline powder. It is easy to oxidize in moist air, insoluble in water and alcohol, soluble in hydrochloric acid, ammonium chloride, and ammonia water, and slightly soluble in nitric acid.

Cuprous oxide, molecular formula Cu2O, dark red or brown crystalline powder. It is easy to oxidize in moist air, insoluble in water and alcohol, soluble in hydrochloric acid, ammonium chloride, and ammonia water, and slightly soluble in nitric acid.

Cuprous oxide, molecular formula Cu2O, dark red or brown crystalline powder. It is easy to oxidize in moist air, insoluble in water and alcohol, soluble in hydrochloric acid, ammonium chloride, and ammonia water, and slightly soluble in nitric acid.