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For the following reaction: A_(g)+2B_(g) → C_(g) When [B] is decreasing at 0.…
Related Topics
Wize University Chemistry Textbook > Kinetics
Rate of Reaction
4 Activities
For the following reaction:
A
(
g
)
+
2
B
(
g
)
→
C
(
g
)
A_{(g)}+2B_{(g)} \to C_{(g)}
A
(
g
)
+
2
B
(
g
)
→
C
(
g
)
When [B] is decreasing at 0.5 M/s, how fast is [A] decreasing?
1.0 M/s
0.5 M/s
0.25 M/s
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More Rate of Reaction Questions:
Rate Laws: Relative Rates of Reactions
Consider the balanced chemical equation for the reaction
2
C
O
(
g
)
+
O
2
(
g
)
⟶
2
C
O
2
(
g
)
R
a
t
e
=
k
[
C
O
]
2
2CO(g)+O_2(g)⟶2CO_2(g)\qquad Rate=k[CO]^2
2
C
O
(
g
)
+
O
2
(
g
)
⟶
2
C
O
2
(
g
)
R
a
t
e
=
k
[
C
O
]
2
If the rate of the reaction is 3.2 M/s which of the following is TRUE.
Given the following data for the
N
H
4
+
+
N
O
2
−
→
N
2
+
2
H
2
O
NH_4^++NO_2^-→N_2+2H_2O
N
H
4
+
+
N
O
2
−
→
N
2
+
2
H
2
O
reaction, the rate law for the reaction is
T
r
i
a
l
[
N
H
4
+
]
[
N
O
2
–
]
R
a
t
e
1
0.010
M
0.030
M
0.020
M
/
s
2
0.015
0.030
0.030
3
0.010
0.015
0.005
\def\arraystretch{1.5} \begin{array}{c} Trial &[NH_4^+] &[NO_2^–]& Rate \\ \hline 1 & 0.010 M & 0.030 M &0.020 M/s \\ 2& 0.015& 0.030 &0.030 \\ 3&0.010 & 0.015 &0.005 \\ \end{array}
T
r
ia
l
1
2
3
[
N
H
4
+
]
0.010
M
0.015
0.010
[
N
O
2
–
]
0.030
M
0.030
0.015
R
a
t
e
0.020
M
/
s
0.030
0.005
Rate Laws: Relative Rates of Reactions
Consider the balanced chemical equation for the reaction
2
C
O
(
g
)
+
O
2
(
g
)
⟶
2
C
O
2
(
g
)
R
a
t
e
=
k
[
C
O
]
2
2CO(g)+O_2(g)⟶2CO_2(g)\qquad Rate=k[CO]^2
2
C
O
(
g
)
+
O
2
(
g
)
⟶
2
C
O
2
(
g
)
R
a
t
e
=
k
[
C
O
]
2
If the rate of the reaction is 3.2 M/s which of the following is TRUE.
Given the following data for the
N
H
4
+
+
N
O
2
−
→
N
2
+
2
H
2
O
NH_4^++NO_2^-→N_2+2H_2O
N
H
4
+
+
N
O
2
−
→
N
2
+
2
H
2
O
reaction, the rate law for the reaction is
T
r
i
a
l
[
N
H
4
+
]
[
N
O
2
–
]
R
a
t
e
1
0.010
M
0.030
M
0.020
M
/
s
2
0.015
0.030
0.030
3
0.010
0.015
0.005
\def\arraystretch{1.5} \begin{array}{c} Trial &[NH_4^+] &[NO_2^–]& Rate \\ \hline 1 & 0.010 M & 0.030 M &0.020 M/s \\ 2& 0.015& 0.030 &0.030 \\ 3&0.010 & 0.015 &0.005 \\ \end{array}
T
r
ia
l
1
2
3
[
N
H
4
+
]
0.010
M
0.015
0.010
[
N
O
2
–
]
0.030
M
0.030
0.015
R
a
t
e
0.020
M
/
s
0.030
0.005
Elements: Radioactive Decay in Smoke Detectors
Americium-241 is a synthetic isotope made in nuclear reactors around the world. Chances are you have been in close proximity to this radioactive isotope thousands of time in your life because it is used in household smoke detectors.
241
A
m
^{241}\rm Am
241
Am
is an alpha emitter whose decay obeys a first order rate-law (as do all nuclear decays) with a half-life of 432.6 years. What is the rate constant of its decay? How much
241
A
m
^{241}\rm Am
241
Am
would remain of a 25mg sample if it were left for 300 years.
The Rate Law
Express the rate of reaction in terms of the change in concentration of each reactant and product:
A
(
g
)
+
2
B
(
g
)
→
C
(
g
)
A_{(g)}+2B_{(g)} \to C_{(g)}
A
(
g
)
+
2
B
(
g
)
→
C
(
g
)