1)Give two effects that the extraction of copper using copper pyrite could have on the environment
2)Give three uses of copper metal.In each case support your answer with a reason
3)Explain why copper can be extracted electrolytically from aqueous copper chloride while aluminum cannot be extracted from its aqueous chloride by the same method
1) The extraction of copper using copper pyrite could have two negative effects on the environment. Firstly, the process of extracting copper from copper pyrite requires a significant amount of energy, leading to high levels of carbon emissions and contributing to climate change. Secondly, the extraction process can result in the release of sulfur dioxide into the atmosphere, which can lead to acid rain and harm ecosystems.
2) Three uses of copper metal are:
- Electrical wiring: Copper is an excellent conductor of electricity, making it an ideal material for electrical wiring. Its high conductivity ensures efficient transmission of electricity with minimal energy loss.
- Plumbing: Copper is commonly used in plumbing due to its corrosion resistance and ability to handle high temperatures, making it a durable and reliable material for pipes and fittings.
- Roofing: Copper roofing is popular for its aesthetic appeal, durability, and longevity. Copper roofs can last for decades without needing replacement, making them a sustainable choice for buildings.
3) Copper can be extracted electrolytically from aqueous copper chloride because copper is a less reactive metal than aluminum. In the electrolytic extraction process, the more reactive metal (in this case aluminum) would not be deposited at the cathode, as it would preferentially react with water or hydroxide ions in the solution rather than being reduced at the cathode. This is why aluminum cannot be extracted from its aqueous chloride by the same method as copper.