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10 June, 12:25

What overall effect does adding a catalyst have on a chemical reaction? It increases pressure on the system. It increases reactant surface area. It lowers the activation energy that is needed. It lowers the concentration of reactants.

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  1. 10 June, 14:10
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    The correct answer in the choices above is that it lowers the activation energy that is needed. When the activation energy is lowered than what is really needed then it would likely cause disruption in the chemical reaction. That is the purpose of the catalyst if it has been added.
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