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6.1 Improving processes and products

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Question 1

Malachite ore is heated and then reacted with excess carbon.

CuCO3→CuO+CO2 \text{CuCO}_3 \rightarrow \text{CuO} + \text{CO}_2 CuCO3​→CuO+CO2​ 2CuO+C→2Cu+CO2 2\text{CuO} + \text{C} \rightarrow 2\text{Cu} + \text{CO}_2 2CuO+C→2Cu+CO2​

A 2000 kg batch of the ore contains 65.0% copper carbonate, CuCO3\text{CuCO}_3CuCO3​, by mass. The rest of the ore does not react. Both reactions go to completion.

Relative atomic mass (ArA_rAr​): C = 12.0 O = 16.0 Cu = 63.5

Calculate the total maximum mass of carbon dioxide produced from this batch of ore.

Give your answer in kg.

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Markscheme

6.1 Improving processes and products Questions

  1. GCSE
  2. /Chemistry
  3. /6.1 Improving processes and products

136 exam-style questions on OCR GCSE Chemistry 6.1 Improving processes and products, covering 6.1.1 Extracting metals industrially and by electrolysis, 6.1.2 Life cycle assessment and recycling, 6.1.3 Biological methods of metal extraction, 6.1.4 The Haber process and the production of fertilisers, 6.1.5 Alloys and their uses, 6.1.6 Corrosion and its prevention, 6.1.7 Comparing and selecting materials, and 6.1.8 Industrial conditions, rate and position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.

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