Chemistry Reference
In-Depth Information
(a)
Hydrogen peroxide solutions are normally stable, but when
metal ions are added, hydrogen peroxide decomposes:
Q9.2
2H
2
O
2
1
O
2
In a solution containing FeCl
3
, the concentration of H
2
O
2
varied as follows:
2H
2
O
Time (s)
0
0 27
52
86
121
160
218
[H
2
O
2
] (
M
)
0.80
0.72
0.64
0.56
0.48
0.40
0.32
Using these data, determine the order of the reaction with
respect to peroxide, and the value of
the rate constant
(include appropriate units).
(b)
Discuss how you would use kinetic data obtained from
monitoring the degradation of a drug to construct an
Arrhenius plot. How could you use this plot to determine
the frequency factor and activation energy for the reaction?
(c)
For a first-order reaction, deduce the units for the frequency
factor and activation energy.
(Answers to problems can be found on p. 266.)
