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3 Quantitative chemistry

3 Quantitative chemistry

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Question 15

Copper can be produced from copper(II) oxide by electrolysis.

The equation for the reaction is:

2CuO→2Cu+O2 2CuO \rightarrow 2Cu + O_2 2CuO→2Cu+O2​

Calculate the percentage atom economy for the production of copper from copper(II) oxide.

Use the equation:

Percentage atom economy=Total relative formula mass of desired productTotal relative formula mass of all reactants×100 \text{Percentage atom economy} = \frac{\text{Total relative formula mass of desired product}}{\text{Total relative formula mass of all reactants}} \times 100 Percentage atom economy=Total relative formula mass of all reactantsTotal relative formula mass of desired product​×100

Relative atomic masses (ArA_rAr​):

  • Cu=64Cu = 64Cu=64
  • O=16O = 16O=16
[3]
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