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 th... 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.
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Answer
Solder A contains lead, which is toxic or harmful, making it less desirable compared to solders B and C.
Step 2
Suggest one reason why solders B and C have different melting points.
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Answer
The proportions of the metals in solder B and solder C differ, leading to variations in their melting points.
Step 3
Suggest three reasons why recycling scrap copper is a more sustainable way of obtaining copper than processing copper ores.
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Answer
Recycling conserves copper ores, which are finite resources.
Recycling uses less energy compared to processing copper ores.
Recycling reduces waste and the environmental impact associated with mining.
Step 4
Describe how copper is extracted from low-grade ores by phyto mining.
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Answer
Plants are grown on land containing copper ores.
The plants are burnt to produce ash.
The ash is dissolved in acid to produce a solution of a copper compound.
Electrolysis of the solution is performed to extract copper.
Step 5
Suggest two reasons why phyto mining has not been widely used to extract copper.
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High-grade ores are still available, making phyto mining less attractive.
