# Rates

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• Created by: Abi9ai1
• Created on: 27-11-19 13:49
Describe the shape of a zero order concentration time graph
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Explain the shape of a zero order concentration time graph
The concentration of the reactant does not have an impact on the rate of reaction. So the grsdient remains constant.
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Describe the shape of a first order concentration time graph
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Explain the shape of a first order concentration time graph.
The rate of reaction is proportional to the concentration of a reactant.
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What is a half life?
The time taken for the concentration of a reactant to halve.
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What is the half life for a first order reaction
Constant
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What graph should half life be measured from to determine order?
Concentration-time graph
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A is 1st order B is 2nd order and C is 0 order, what is the rate equation?
Rate = k[A] [B]²
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Define order
The order of a reactant is the power to which the reactant's (or catalyst's) concentration is raised in the rate equation.
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What is overall order?
The overall order of a reaction is the sum of the individual orders in the rate equation.
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What is the symbol for the rate constant?
k
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How does a zero order reactant effect rate?
No effect
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How does a first order reactant effect rate?
The change in rate is the same as the change in concentration
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How does a first order reactant effect rate?
The change in rate is the square of the change in concentration.
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Describe the shape of a 0 order rate-concentration graph
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Describe the shape of a 1st order rate-concentration graph
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Describe the shape of a 2nd order rate-concentration graph
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Explain the shape of a 0 order rate-concentration graph
The concentation has no effect on the rate, giving a graph with a constant rate.
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Explain the shape of a 1st order rate-concentration graph
The rate is proportional to the concentration giving a graph with a straight line through the origin.
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Explain the shape of a 2nd order rate-concentration graph
The rate is proportional to the square of the concentration giving a graph with a curve.
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What is the rate determining step?
The slow step in a multi-step reaction, and the reactants in this step appear in the rate equation.
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## Other cards in this set

### Card 2

#### Front

Explain the shape of a zero order concentration time graph

#### Back

The concentration of the reactant does not have an impact on the rate of reaction. So the grsdient remains constant.

### Card 3

#### Front

Describe the shape of a first order concentration time graph

#### Back ### Card 4

#### Front

Explain the shape of a first order concentration time graph.

#### Back ### Card 5

#### Front

What is a half life?

#### Back 