Photo AI
This question is about copper and alloys of copper - AQA - GCSE Chemistry - Question 8 - 2021 - Paper 2
Question 8
This question is about copper and alloys of copper. Solders are alloys used to join metals together. Some solders contain copper. Table 4 shows information about ... show full transcript
Worked Solution & Example Answer:This question is about copper and alloys of copper - AQA - GCSE Chemistry - Question 8 - 2021 - Paper 2
Step 1
Suggest one reason why solder B and solder C are now used more frequently than solder A for health reasons.
Answer
Solder A contains lead, which is toxic and poses health risks such as lead poisoning. By using solders B and C, which do not contain lead, health risks are significantly reduced.
Step 2
Step 3
Suggest three reasons why recycling scrap copper is a more sustainable way of obtaining copper than processing copper ores.
Answer
- Recycling conserves copper ores, which are finite resources.
- Recycling uses less energy compared to extracting copper from ores, which reduces carbon emissions.
- Recycling decreases the environmental impacts caused by mining and quarrying, preserving ecosystems.
Step 4
Describe how copper is extracted from low-grade ores by phyto-mining.
Answer
- Plants are grown on land that contains copper ores.
- These plants absorb copper ions from the soil as they grow.
- Once the plants are mature, they are harvested and burned to produce ash.
- The ash contains a solution of copper compounds, which can then be processed to extract copper.
Step 5