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Effect of an increase in concentration of a reactant on the rate of reaction
Number of particles per unit volume increases; frequency of effective collision increases; rate of reaction increases
"according to the Collision Theory"
Effect of an increase in temp on the rate of reaction?
There's an increase in the avg kinetic energy of reactant molecules; more molecules possess energy larger than or equals to the activation energy; resulting in more collisions with energy larger or equal to the activation energy; increase in frequency of effective collisions; rate increases
Effect of a catalyst on the rate of reaction?
A catalyst is a substance that alters the rate of reaction while remaining chemically unchanged at the end of the reaction
In the presence of a catalyst, the reaction has a different pathway with a lower activation energy compared to the uncatalysed reaction; more molecules will possess energy greater or equal to this lowered activation energy; hence the frequency of effective collisions increase; rate of reaction increases
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