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Why cuprous oxide is almost insoluble in water

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Update time : 2023-01-20 08:11:34
What is cuprous oxide?
Cuprous oxide is a dark red cubic crystal or orange-yellow crystalline powder, which is toxic. Although it can exist stably in dry air, it is gradually oxidized to copper oxide in wet air. It is insoluble in water and ethanol, soluble in dilute sulfuric acid and disproportionated to copper sulfate and copper metal, soluble in Chemicalbook nitric acid and oxidized to copper nitrate, and Dissolve in concentrated hydrochloric acid or ammonia water to form stable complex H3 [CuCl4] or colourless coordination ion [Cu (NH3) 2]+. The latter is oxidized by air to the blue [Cu (NH3) 4] 2+. Cuprous oxide is a yellow or even red crystalline powder. The size of the particles causes the colour difference. The structure is a red copper ore-type (cubic crystal system) with a relative density of 6.04. The melting point is 1232 , and the heat of formation is 166.67 kJ/mol. It loses oxygen at 1800 , is insoluble in water and is soluble in ammonia water; it reacts with concentrated hydrochloric acid to produce white chlorinated Chemicalbook cuprous crystalline powder. Cuprous oxide contains excess oxygen atoms, and holes appear in the lattice of Cu+, which acts as an acceptor of electrons. It is a P-type semiconductor. The energy level is about 1.5eV, and the acceptor energy level is 0.3~0.5eV above the valence electron band. In addition, it is well known that the spectrum of absorption excited atoms represents the configuration of hydrogen atoms.
 
Use of cuprous oxide
Cuprous oxide is used to make ship bottom antifouling paint to kill low-grade marine animals, and it is also used as an agricultural fungicide. Cuprous oxide is also a colourant for ceramics and enamel, a red glass dye, and various copper salts and analytical reagents. Cuprous oxide is used to make copper ruby glass. The metal copper precipitates colloids when this glass is melted; This shows the red colour of copper ruby glass. Increasing the silicon oxide content in the glass can form a good and stable colour. To make copper ruby glass, it is necessary to add the reducing agent tartrate or carbon powder matched with cuprous oxide in the ingredient of the batch. In addition, adding tin in the form of salt oxide in the batch protects colloids and prevents the excessive growth of colourant grains, and the excessive growth of crystal grains will form a "liver colour". According to the different amounts of cuprous oxide added, the glass will be blue or green, and At this time, it is better to add saltpetre to the batch. The mixture of copper oxide and oxidized silica can make the sloping glass beautiful blue. To get green, copper and iron or chromium compounds can be used simultaneously. Iron oxide must be added to the batch to obtain an emerald colour. Adding 2~3% B203 and saltpetre to the batch can enhance the lustre of slope glass. Copper oxide is used for ship antifouling primer and can be used as a red pigment for glass and ceramics, Fungicides for crops and materials for rectifiers; It is also used to manufacture various copper salts, analytical reagents, etc.
 
Price of cuprous oxide
Cuprous oxide particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of cuprous oxide. A large amount of large amount will be lower. The Price of cuprous oxide can be found on our company's official website.
 
Cuprous oxide supplier
Luoyang Tongrun Nano Technology Co. Ltd.  (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including cuprous oxide, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective cuprous oxide, you are welcome to contact us or inquire at any time.
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