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Anonymous users2024-02-05When copper is heated in air, black copper oxide Cuo is formed on the surface; In the absence of oxygen, red cuprous oxide Cu2O is formed. Copper reacts with sulfur vapor to form copper sulfide Cus, cuprous sulfide Cu2S, or non-stoichiometric copper sulfide. Copper reacts with halogens at room temperature; It does not react with nitrogen even at high temperatures; In the case of heating, it reacts with nitrous oxide and nitrogen oxide to form Cu2O; It reacts with nitrogen dioxide to form cuo.
Copper is chemically inactive and does not react in dry air and water; When in contact with moist air containing carbon dioxide, a green patina gradually forms on the surface
The reaction of 2Cu+O2+CO2+H2O==Cu(OH)2·CuCO3 copper with acid depends on the different concentrations of acids.
Copper does not react with acidic acids such as hydrochloric acid or dilute sulfuric acid, but reacts with strong oxidizing nitric acid or hot concentrated sulfuric acid
Cu + 4 Hno3 (concentrated) Cu (No3) 2 + 2 No2 +2H2O3Cu + 8Hno3 (dilute) 3 Cu (No3) 2 + 2 No + 4H2OCU + 2H2SO4 (concentrated) CuSO4 + SO2 + 2H2O
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Anonymous users2024-02-04Chemical Formula: Cu2(OH)2CO3 or Cu(OH)2*CuCO3 The asterisk is the dot in between.
Heating: Cu2(OH)2CO3===2CuO+H2O+CO2 (gas symbol).
Acid: Cu2(OH)2CO3+4HCl===2CuCl2+3H2O+CO2 (gas symbol).
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Anonymous users2024-02-03cu2(oh)2co3
Cu2(OH)2CO3=Heating==2CuO+H2O+CO2 Preparation method: It is obtained by adding boiling water to precipitate by mixing copper sulfate and sodium bicarbonate finely.
Solubility: insoluble in cold water and alcohol, soluble in acids, cyanide, ammonia and ammonium salts.
Preparation method: Sodium carbonate is added to the dilute copper sulfate solution, or carbon dioxide is passed into the copper hydroxide suspension to obtain basic copper carbonate precipitation.
Uses: used in the manufacture of paint pigments, pyrotechnics, pesticides, other copper salts and solid phosphor activators, etc., also used in seed treatment and fungicides. It is also used as a pigment.
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Anonymous users2024-02-02Chemical propertiesThe chemical formula is Cu2(OH)2CO3, also known as malachite, which is a precious mineral gemstone.
It is a substance produced by the reaction of copper with substances such as oxygen, carbon dioxide, and water in the air, and is also known as patina (patina).
When heated in air, it decomposes into copper oxide, water, and carbon dioxide. Apatina (patina) is also a basic type of copper carbonate. Copper reacts with O2, CO2, H2O in the air and rusts to produce patina Cu2(OH)2CO3.
Heating can produce CuO, CO2, H2O.
Chemical equation: Cu2(OH)2CO3 heats 2CuO+CO2+H2O
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Anonymous users2024-02-01When pouring boiling water, the hot water bottle stopper should be placed upside down on the table, at this time it can be observed that the white mist appears at the mouth of the bottle, and the white mist disappears after rising a certain distance, this is because.
1.Water molecules are small 2There is a gap between the water molecules 3Water molecules are in constant motion.
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