How much do you know about cuprous oxide?

Overview of cuprous oxide
Cuprous oxide, whose chemical formula is Cu2O, is an oxide of monovalent copper. It is a bright red powdery solid and is almost insoluble in water. It disproportionates to divalent copper and copper element in acidic solution, and gradually oxidizes to black in humid air. Copper oxide. Cuprous oxide is mainly used in the manufacture of antifouling paint on the bottom of ships (used to kill low-level marine animals), insecticides, various copper salts, analytical reagents, red glass, and also used in the preparation of copper plating and copper alloy plating solutions .

 
The chemical properties of cuprous oxide
Cuprous oxide is a red or dark red octahedral cubic crystalline powder. It quickly turns blue in water and gradually oxidizes to black copper oxide in the humid air. It is insoluble in water and alcohol, soluble in hydrochloric acid, ammonium chloride, ammonia, and slightly soluble in nitric acid. Dissolved in hydrochloric acid to produce white cuprous chloride crystalline powder. Meet dilute sulfuric acid and dilute nitric acid to produce copper salt. Will quickly turn blue in the air. It can be dissolved in concentrated alkali, ferric chloride, and other solutions.
 
Related reactions of cuprous oxide
Disproportionation into divalent copper in an acid solution indicates that the stability of divalent copper ions in the solution is greater than that of monovalent copper ions. For example, cuprous oxide reacts with sulfuric acid to produce copper sulfate and copper. Cu2O + H2SO4 → CuSO4 + Cu + H2O.
The cuprous oxide reacts with nitric acid to produce copper nitrate, nitric oxide, and water. 3Cu2O + 14HNO3 (lean) → 6Cu(NO3)2 + 2NO↑ + 7H2O.
Cuprous oxide reacts with ammonia water and hydrohalic acid and does not disproportionate to divalent copper and copper due to the formation of complexes
Dissolved in concentrated ammonia solution to form a colorless complex [Cu(NH3)2]+ (copper(I) ammonia ion), which is oxidized to blue [Cu(NH3)4(H2O)2]2+ in the air (Copper (II) dihydrate ammonia ion).
Cuprous oxide can be dissolved in hydrochloric acid to form HCuCl₂ (complex of cuprous chloride), and it can also be dissolved in sulfuric acid and nitric acid to form copper sulfate and copper nitrate, respectively.
 
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