Transcript Chemistry 100

Lon-Capa
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8th (final) HW assignment due Tuesday,
December 2 by 5 pm.
Quiz #6 open Friday at 5 pm. Due Tuesday,
December 2 by 10 pm.
Exams and Practice Exams on website
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To find rate laws…
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Concentration versus rate (initial)
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Concentration versus time
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Rate Can Change with Time
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aA + bB  cC
Experiment
1
2
3
[A]
0.10 M
0.20 M
0.10 M
[B]
0.10 M
0.10 M
0.20 M
init. rate
x
2x
x
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Clicker Question
Expt.
1
2
3
[A]
0.10 M
0.20 M
0.40 M
[B]
0.20 M
0.20 M
0.40 M
init. rate
1.0 x 10-5 M/s
2.0 x 10-5 M/s
1.6 x 10-4 M/s
The rate law for aA + bB  cC is:
a) rate = k[A][B]
b) rate = k[A]2[B]
c) rate = k[A][B]2
d) rate = k[A]2[B]2
e) I don’t know
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Concentration vs. Time
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A Second Order Reaction
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Good to Know…
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Half-Life
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Good to Know…
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Clicker Question
Determine the missing
time given the following
orders of reaction for
aA  Products
a)
b)
c)
d)
zero 1st
20
20
30
20
15
20
Not sure.
2nd
20
15
30
[A]
Time
1.00 M
0
0.500 M
10 sec
0.250 M
?? sec
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