(2) The pH value of the leaching solution (1 min)? Acidity of stripping agent (1 min)

(3) ① (2 points)

② 2cuso4+2h2o2cu+O2 =+2h2so4 (2 points) (4) Cu2 (OH) 2co3 (2 points)

(2 points)

(1) According to the information provided, the reaction is a redox reaction of chalcopyrite, oxygen and sulfuric acid, and copper sulfate, ferric sulfate and water are generated.

⑵ According to the chemical balance of extraction and stripping, the extraction degree is affected by the pH value of the extraction solution and the acidity of the stripping agent.

⑶ The reaction of electrolytic copper sulfate solution is 2cuso4+2h2o2cu+O2 ↑+2h2so4. The anode generates oxygen, which is connected to the positive pole of the power supply, and the cathode precipitates copper, which is connected to the negative pole of the power supply.

⑶ The main component of copper rust is Cu 2 (OH) 2 CO 3. In order to protect copper from corrosion, copper can be used as anode of primary battery or cathode of electrolytic cell, and cathodic protection methods of sacrificial anode and external power supply can be adopted to prevent copper corrosion.