In this worksheet, we will practice describing the production of solid copper from ores by processes such as smelting, bioleaching, and electrolysis.
Which of the following is not a common application of copper?
- A Coins
- B Electrical wiring
- C Plumbing
- D Structural supports in buildings
- E Jewelry
Copper is found in two types of ore: copper-rich and copper-poor ores. Which of the following is not a common industrial method for removing copper from its ores?
- A Smelting by mixing with air at high temperatures
- B Treatment with sulfuric acid to produce a solution of copper sulfate
- C Bioleaching, where bacteria feed on components of the ore, producing soluble copper ions
- D Displacement with calcium, where the ore is mixed with molten calcium, generating solid copper and calcium salts
- E Phytomining, where plants draw in copper ions from the soil
One of the final steps of copper refining is electroplating copper onto a copper electrode. When the deposited copper comes from a copper sulfate solution, such as that produced from sulfuric acid leaching, the process is called electrowinning.
In electrowinning, a lead anode and a copper cathode are immersed in a bath of copper(II) sulfate, and a potential difference is applied.
What is the half-equation of the reaction that occurs at the cathode?
What is the half-equation of the reaction that occurs at the anode?