Homogenous vs. Heterogenous Catalyst and Rate Law

Arrhenius Equation: $\ln k = - \frac{E_{a}}{RT} + \ln A$

Ava Harvey 2B
Posts: 54
Joined: Fri Sep 29, 2017 7:04 am

Homogenous vs. Heterogenous Catalyst and Rate Law

I understand that the difference between a homogenous and heterogenous catalyst lies in the phase of the catalyst. However, the book mentions that the concentration of a homogeneous catalyst does appear in the rate law, but it doesn't mention whether a heterogenous catalyst appears in the rate law. I was just wondering if the same concept applied, and if not, the reasoning behind that. If anyone has an explanation, that would be great! Thanks so much!

Shawn Patel 1I
Posts: 54
Joined: Thu Jul 27, 2017 3:01 am

Re: Homogenous vs. Heterogenous Catalyst and Rate Law

Hey,
I would assume heterogenous catalysts would be included in the rate law because its purpose as a catalyst is still the same. It lowers the activation energy, increasing the reaction speed, so the rate would be affected.

Lindsay Kester 2L
Posts: 29
Joined: Thu Jul 27, 2017 3:00 am

Re: Homogenous vs. Heterogenous Catalyst and Rate Law

I think that since heterogeneous catalysts are usually used in the solid phase, their appearance in the rate law would depend on the phases of the other reactants and products.