Copper can be extracted from copper sulfide by heating it in air - OCR Gateway - GCSE Chemistry Combined Science - Question 6 - 2020 - Paper 10

To find the maximum mass of copper that can be extracted from the ore, follow these steps:

1. Calculate the mass of copper sulfide in the ore:
   The ore contains 2.00% copper sulfide. For 150 kg of ore, the mass of copper sulfide can be calculated as:

   ext{Mass of copper sulfide} = ext{Total mass of ore} \times rac{2.00}{100} = 150 imes 0.02 = 3.00 \text{ kg}

2. Calculate the mass of copper in the copper sulfide:
   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:

   ext{Mass of copper} = ext{Mass of copper sulfide} \times rac{74.0}{100} = 3.00 \times 0.74 = 2.22 \text{ kg}

Hence, the maximum mass of copper that can be extracted from 150 kg of ore is 2.22 kg.