# Kinetics AQA

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What is kinetics?
Study of reaction rates
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The definition of 'rate of reaction'?
The rate of change of concentration of reactants or products
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What is the rate equation?
r = k[A][B]
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What can initial rates be used for?
To determine the order with respect to a reactant
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How do you calculate the total order of a reaction?
Add all the individual orders together (0,1 or 2)
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What are the possible reaction orders?
0, 1 or 2
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What does order 0 mean in respect to the effect on rate?
Changing the concentration has no effect on the rate -> r=k
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What does order 1 mean in respect to the effect on rate?
Doubling the concentration, doubles the initial rate/proportion to concentration -> r=k[A]1
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What does order 2 mean in respect to the effect on rate?
Doubling the concentration, increases initital rate by a factor of four/[A] squared -> r=k[A]2
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What do the units of 'k' depend on?
The overall order of the reaction
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If temperature increases, what is the effect on 'k'?
'k' increases
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What are the units of 'k' for 1st order?
s-1
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What are the units of 'k' for 2nd order?
mol-1dm3s-1
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What are the units of 'k' for 3rd order?
mol-2dm6s-1
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What is the equation used to figure out 'k'?
rate divided by [A]x[B]
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What is the rate determing step?
The slowest step
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## Other cards in this set

### Card 2

#### Front

The definition of 'rate of reaction'?

#### Back

The rate of change of concentration of reactants or products

### Card 3

#### Front

What is the rate equation?

### Card 4

#### Front

What can initial rates be used for?

### Card 5

#### Front

How do you calculate the total order of a reaction?