Rates of Reaction Flashcards

(9 cards)

1
Q

How are rates of reaction measured?

A

By observing the changes in quantities of reactants or products over time

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2
Q

Rate =

A

change in concentration/ time

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3
Q

Concentration

A
  • Measured in moldm-3
  • units:moldm-3s-1
  • [A] means concentration of A
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4
Q

Zero order

A
  • When the concentration of a reactant has no effect on the rate.
  • Any number raised to the power of zero is 1
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5
Q

First order

A
  • A reaction is first order when the rate depends on the concentration raised to the power of one.
  • Any change in concentration gives the same change in rate.
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6
Q

Second order

A

A r

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7
Q

Second order

A
  • A reaction is second order when the rate depends on the concentration raised to the power of 2
  • Any change in concentration changes the rate by the square of the change
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8
Q

Overall order

A

The overall order of reaction gives the overall effect of the concentrations of all reactants on the rate of reaction

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9
Q

How are orders determined?

A
  • They are determined experimentally by monitoring how a physical quantity changes over time.
  • Orders can’t be found from a chemical equation
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