## Why are Mechanisms involving Enzyme/Catalysts Zero Order?

$\frac{d[R]}{dt}=-k; [R]=-kt + [R]_{0}; t_{\frac{1}{2}}=\frac{[R]_{0}}{2k}$

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### Why are Mechanisms involving Enzyme/Catalysts Zero Order?

I have in my notes from lecture that enzymes and catalysts are zero order with regards to mechanisms. Why is this? Don't enzymes/catalysts make the rate faster by creating a pathway of lower activation energy and thereby, affect the rate of a reaction?

Oscar Beltran 3H
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### Re: Why are Mechanisms involving Enzyme/Catalysts Zero Order?

A zero-order reaction means that the reaction's rate is independent on the concentration of reactant/reactants. It makes sense in reactions with enzymes to be zero order because when enzymes are used, the reaction's rate will depend only on the rate at which the enzyme can make the reaction proceed.

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