Chem - kinetics

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7 Terms

1
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what are the orders of reaction used for

used to relate the rate of a reaction to the reacting species

2
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If changing the concentration of a reactant A has no effect on the rate of the reaction


then the reaction is zero order with respect to A

Zero order means the concentration of that reactant has no effect on the rate. Doubling it changes nothing.

3
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If doubling the concentration of a reactant A doubles the rate of the reaction,

reaction is first order with respect to A . First order means the rate is directly proportional to the concentration. Double the concentration → double the rate.

4
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If doubling the concentration of reactant A increases the rate of the reaction 4x

then the reaction is second order with respect to A .

5
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The rate can be expressed as for the first order

where k is the rate constant and A is the concentration of reactant A in mol l-1

<p>where k is the rate constant and A is the concentration of reactant A in <strong>mol l<sup>-1</sup></strong></p>
6
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The rate can be expressed as: rate = kA2 for which order?

2

7
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The rate of a chemical reaction normally depends

on the concentrations of the reactants.