How does a catalyst work?
1 mark · EasyState what a catalyst does to the activation energy, as shown on a reaction profile diagram.
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It provides an alternative route with a lower activation energy.
Also accept: It lowers the activation energy required.; Gives a route with lower activation energy.; Allows the reaction to happen with lower activation energy.
Common mistakes: It changes the energies of reactants/products.; It increases energy.
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Marking points
B1 · 1 mark · States that a catalyst provides an alternative route with a lower activation energy (or equivalent).
Worked solution
A catalyst provides an alternative route for the reaction, with a lower activation energy.