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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.

Justin Parker

in Chemistry

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Whitney Matthews on September 12, 2018

Answer: Option (c) is the correct answer.Explanation:a catalyst is A substance that increases the rate of a reaction without getting consumed in the chemical reaction. Activation energy is the amount of energy required by the reacting species to undergo a chemical reaction. A catalyst decreases the activation energy needed for the reaction.Prior to the addition of a catalyst in a chemical reaction, the particles are in motion due to the crossing of a high energy path. Particles that have low energy were not able to cross this high-energy path. Therefore, this path acts as a barrier for the particles with low energy. Therefore, low-energy particles that were not able to participate in the reaction.The addition of a catalyst, the activation energy decreases and, therefore, the path of the reaction changes. Therefore, the low energy particle can now cross this new energy barrier and, therefore, they can also participate in the reaction. Therefore, the speed of reaction will also increase.


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