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Copper can be extracted from copper sulfide by heating it in air - OCR Gateway - GCSE Chemistry Combined Science - Question 6 - 2020 - Paper 10
Question 6
Copper can be extracted from copper sulfide by heating it in air. Copper sulfide contains 74.0% copper by mass. An ore contains 2.00% copper sulfide. What is the ... show full transcript
Worked Solution & Example Answer:Copper can be extracted from copper sulfide by heating it in air - OCR Gateway - GCSE Chemistry Combined Science - Question 6 - 2020 - Paper 10
Step 1
What is the maximum mass of copper that can be extracted from 150 kg of the ore?
Answer
To find the maximum mass of copper that can be extracted from the ore, follow these steps:
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Calculate the mass of copper sulfide in the ore:
ext{Mass of copper sulfide} = ext{Total mass of ore} \times rac{2.00}{100} = 150 imes 0.02 = 3.00 \text{ kg}
The ore contains 2.00% copper sulfide. For 150 kg of ore, the mass of copper sulfide can be calculated as: -
Calculate the mass of copper in the copper sulfide:
ext{Mass of copper} = ext{Mass of copper sulfide} \times rac{74.0}{100} = 3.00 \times 0.74 = 2.22 \text{ kg}
Copper sulfide contains 74.0% copper by mass. Therefore, to find out how much copper can be extracted from the 3.00 kg of copper sulfide, we compute:
Hence, the maximum mass of copper that can be extracted from 150 kg of ore is 2.22 kg.