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A-Level OCR A Chemistry - 5A The rate equation > Rate and concentration > Flashcards

Rate and concentration Flashcards

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1
Q

What is the rate equation?

A

rate = k [A]ᵐ [B]ⁿ

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2
Q

What is ‘k’?

A

Rate constant

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3
Q

What is ‘m”?

A

Order with respect to A

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4
Q

What is ‘n’?

A

Order with respect to B

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5
Q

What is ‘m+n’?

A

Overall order of reaction

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6
Q

What are the orders of reaction?

A

0, 1 and 2

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7
Q

What is order of reaction?

A

The power to which the concentration of a reactant is raised in the rate equation

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8
Q

What is overall order?

A

The sum of the individual orders of reactions in the rate equation - ‘m + n’

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9
Q

What is the rate constant?

A

The constant that links the rate of reaction with the concentrations of the reactants raised to the powers of their orders in the rate equation

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10
Q

What is order 0?

A

Rate is unaffected by changes in concentration

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11
Q

What happens if you double the concentration for order 0?

A

The rate stays the same

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12
Q

How do you write order 0?

A

rate = [A]⁰

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13
Q

What is order 1?

A

Rate is directly proportional to concentration

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14
Q

What is order 1?

A

Rate is directly proportional to concentration

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15
Q

What happens if you double the concentration for order 1?

A

The rate doubles

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16
Q

How do you write order 1?

A

rate = [A]¹

17
Q

What is order 2?

A

Rate is proportional to concentration²

18
Q

What happens if you double the concentration for order 2?

A

The rate increases by 2²

19
Q

How do you write order 2?

A

rate = [A]²

20
Q

What is the reactant/time graph for 0 order?

A

Negatively directly proportional

21
Q

What is the reactant/time graph for 1 order?

A

Negatively curved

22
Q

What is the reactant/time graph for 2 order?

A

More negatively curved than 1st

23
Q

What is the reactant/rate graph for 0 order?

A

Straight line through y axis

24
Q

What is the reactant/rate graph for 1st order?

A

Directly proportional

25
Q

What is the reactant/rate graph for 2nd order?

A

Positively curved

A-Level OCR A Chemistry - 5A The rate equation (4 decks)

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