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2236644
Kinetics
Description
Mind Map on Kinetics, created by Amy Holden on 10/03/2015.
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aqa a2 chemistry
kinetics
chapter 1
Mind Map by
Amy Holden
, updated more than 1 year ago
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Created by
Amy Holden
over 9 years ago
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Resource summary
Kinetics
Rate=k x [A]^m x [B]^n
Rate = mol dm^-3 s^-1
The rate of the reaction is defined as the change in conc. with unit time
k = rate constant
The constant of proportionality in the rate expression
The units depend on the orders of the reactants
[A] / [B] = concentration of reactants
mol dm^-3
m / n = orders of reaction with respect to the reactants (0, 1 or 2)
0th order
The rate is not affected by the concentration of a species
1st order
The rate is directly proportional to the concentration of a species
2nd order
The rate is proportional to the square of the concentration of a species
Increasing temperature always increases the rate of reaction and the value of k
Rate determining step
The slowest step in the reaction mechanism. It governs the rate of the overall reaction
The species in the rate equation are the reactants involved in reactions occuring before the rate determining step
If a reactant doesn't appear in the rate equation, it won't be involved in the rate-determining step
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