How to recover copper from its oxide
Due to its properties: thermal and electrical conductivity, ductility, high corrosion resistance, etc., copper has been widely used in human economic activity. In industry, it is extracted from sulphide and oxide ores, and pure copper can be recovered from the laboratory of its oxide.
You will need:
- chemical vessels; - Copper oxide (II); - Zinc; - Hydrochloric acid; - Spirit lamp; - muffle furnace.
Instruction how to recover copper from its oxide
Copper oxide you can recover hydrogen. Please repeat safety when dealing with heaters, as well as acids and flammable gases. Write the reactions: - zinc and hydrochloric acid interaction Zn + 2HCl = ZnCl2 + H2; - hydrogen reduction of copper CuO + H2 = Cu + H2O.
Before performing experience, prepare equipment for him, since both reactions must go hand in hand. Take two tripod. In one of them secure a clean, dry test tube for copper oxide, and in another - the tube with vapor tube, which put a few pieces of zinc. Light the alcohol lamp.
Sprinkle black powder of copper in cooked dishes. Immediately pour the acid zinc. The venting pipe to direct the oxide. Remember that the reaction occurs only when heated. So bring your flame of an alcohol lamp to the bottom of the tube with CuO. All try to do quite quickly, because zinc reacts violently with acid.
Another copper can restore carbon. Make a reaction equation: 2CuO + C = 2Cu + CO2Vozmite powder copper (II) and dry it on fire in an open porcelain dish (powder should be black). Then pour the resulting reagent in a porcelain crucible and add a fine charcoal (coke) at the rate of 10 parts of CuO to 1 part of coke. All carefully rub pestle. Close cap tightly, so that volatilized during the reaction to form carbon dioxide, and put in a muffle furnace at a temperature of about 1000 degrees Celsius.
After the reaction is finished, cool the crucible and contents cover with water. Then stir the resulting suspension, and you will see how easy the coal particles are separated from the heavy reddish balls. Remove the metal produced. Later, if desired, you can try copper alloy in the furnace between the beads themselves.