Chemistry 100
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Transcript Chemistry 100
Lon-Capa
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
1
To find rate laws…
Concentration versus rate (initial)
Concentration versus time
2
Rate Can Change with Time
3
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
4
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
5
Concentration vs. Time
6
A Second Order Reaction
7
Good to Know…
8
Half-Life
9
Good to Know…
10
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
11