Atom economy (AQA GCSE Chemistry): Quizzes

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Atom economy
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What does atom economy show us?

How much reactant becomes useful product

How is atom economy measured?

As a percentage

What does a higher atom economy mean?

Less waste is produced

What is the formula for percentage atom economy?

mass of productmass of reactants×100\frac{\text{mass of product}}{\text{mass of reactants}} \times 100

What must you use to calculate atom economy?

A balanced chemical equation

For C2H4+Br2C2H4Br+HBrC_2H_4 + Br_2 \rightarrow C_2H_4Br + HBr, if desired product mass is 109 and reactants 190, what is atom economy?

57%

Why is high atom economy more sustainable?

Less waste means fewer raw materials used

Why is high atom economy more economical for industry?

Lower costs for materials and waste disposal

When does a reaction have 100% atom economy?

When only one product is formed

Which type of reaction has 100% atom economy?

Polymerisation reactions

Why do polymerisation reactions have perfect atom economy?

All reactant atoms end up in the polymer

If a reaction has 65% atom economy, what happens to the other 35%?

It becomes waste products

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