Rate Law Graphs
Rate Law
Example
Graph
How to straighten the
graph
How to find
rate
constant (k)
Units of rate
constant (k)
0 order
1st order
2nd order
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Rate Law Problems
Rate = k [A]x [B]y
x + y are reactant orders determined from experiment, NOT stoichiometric coefficients
1. The reaction of nitric oxide with hydrogen at 1280°C is:
2NO (g) + 2H2 (g)  N2 (g) + 2H2O (g)
From the following data, determine the rate order, the rate constant, and rate equation
Run
1
2
3
[NO] M
.0100
.0200
.0100
[H2] M
.0100
.0300
.0200
Rate (M/min)
.00600
.144
.0120
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2. What would be the order of a reaction that garnered these results?
Relative [A]
(M)
1
2
3
3. Xe + 3 F2
Relative Rate
(M/s)
1
1
1
XeF6
From the following data, determine the rate order, the rate constant, and rate equation
Experiment
[Xe] M
[F2] M
Initial Rate (M/s)
1
.5
.25
.00156
2
1.5
1.00
.05625
3
.75
.25
.0032
4
1.5
.25
.01406
5
.5
1.00
.00625
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achieve@towson.edu ǀ 410-704-2291