The average rate of disappearance of ozone in the reaction 2O3(g) ® 3O2(g) is found to be 9.0 ´ 10–3 atm over a certain interval of time. What is the rate of appearance of O2 during this interval?
A.
1.3 ´ 10–2 atm/s
B.
9.0 ´ 10–3 atm/s
C.
6.0 ´ 10–3 atm/s
D.
3.0 ´ 10–5 atm/s
E.
2.7 ´ 10–5 atm/s
2.
Consider the reaction X ® Y + Z Which of the following is a possible rate law?
A.
Rate = k[X]
B.
Rate = k[Y]
C.
Rate = k[Y][Z]
D.
Rate = k[X][Y]
E.
Rate = k[Z]
3.
For a reaction in which A and B react to form C, the following initial rate data were obtained:
[A]
[B]
Initial Rate of Formation of C
(mol/L)
(mol/L)
(mol/L × s)
0.2
0.2
0.50
0.4
0.2
2.00
0.8
0.2
8.00
0.2
0.4
1.00
0.2
0.8
2.00
What is the rate law for the reaction?
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.
Rate = k[A]3
4.
A general reaction written as 2A + 2B ® C + 2D is studied and yields the following data:
[A]0
[B]0
Initial D[C]/Dt
0.100 M 0.100 M 0.000040 mol/L × s 0.200 M 0.100 M 0.000160 mol/L × s 0.100 M 0.200 M 0.000040 mol/L × s
What is the order of the reaction with respect to B?
A.
1
B.
4
C.
3
D.
2
E.
0
5.
A general reaction written as 2A + 2B ® C + 2D is studied and yields the following data:
[A]0
[B]0
Initial D[C]/Dt
0.100 M 0.100 M 0.000040 mol/L × s 0.200 M 0.100 M 0.000160 mol/L × s 0.100 M 0.200 M 0.000040 mol/L × s
What is the overall order of the reaction?
A.
1
B.
4
C.
3
D.
2
E.
0
6.
A general reaction written as 2A + 2B ® C + 2D is studied and yields the following data:
[A]0
[B]0
Initial D[C]/Dt
0.100 M 0.100 M 0.000040 mol/L × s 0.200 M 0.100 M 0.000160 mol/L × s 0.100 M 0.200 M 0.000040 mol/L × s
What are the proper units for the rate constant for the reaction?
A.
s–1
B.
mol L–1 s–1
C.
L mol–1 s–1
D.
L3 mol–3 s–1
E.
L2 mol–2 s–1
7.
A general reaction written as 2A + 2B ® C + 2D is studied and yields the following data:
[A]0
[B]0
Initial D[C]/Dt
0.100 M 0.100 M 0.000040 mol/L × s 0.200 M 0.100 M 0.000160 mol/L × s 0.100 M 0.200 M 0.000040 mol/L × s
What is the numerical value of the rate constant?
A.
0.000040
B.
0.000160
C.
0.0040
D.
0.0160
E.
4.0 ´ 10–7
8.
A general reaction written as 2A + 2B ® C + 2D is studied and yields the following data:
[A]0
[B]0
Initial D[C]/Dt
0.100 M 0.100 M 0.000040 mol/L × s 0.200 M 0.100 M 0.000160 mol/L × s 0.100 M 0.200 M 0.000040 mol/L × s
For the first of the reactions in the table of data, how many seconds would it take for [A] to decrease to 0.050 M?
A.
1200
B.
1700
C.
170
D.
2500
E.
250
9.
Consider the following data concerning the equation: H2O2 + 3I– + 2H+ ® I3– + 2H2O
[H2O2]
[I–]
[H+]
rate
I.
0.100 M
5.00 × 10–4 M
1.00 × 10–2 M
0.137 M/sec
II.
0.100 M
1.00 × 10–3 M
1.00 × 10–2 M
0.268 M/sec
III.
0.200 M
1.00 × 10–3 M
1.00 × 10–2 M
0.542 M/sec
IV.
0.400 M
1.00 × 10–3 M
2.00 × 10–2 M
1.084 M/sec
The rate law for this reaction is
A.
rate = k[H2O2][I–][H+]
B.
rate = k[H2O2]2[I–]2[H+]2
C.
rate = k[I–][H+]
D.
rate = k[H2O2][H+]
E.
rate = k[H2O2][I–]
10.
Consider the following data concerning the equation: H2O2 + 3I– + 2H+ ® I3– + 2H2O
[H2O2]
[I–]
[H+]
rate
I.
0.100 M
5.00 × 10–4 M
1.00 × 10–2 M
0.137 M/sec
II.
0.100 M
1.00 × 10–3 M
1.00 × 10–2 M
0.268 M/sec
III.
0.200 M
1.00 × 10–3 M
1.00 × 10–2 M
0.542 M/sec
IV.
0.400 M
1.00 × 10–3 M
2.00 × 10–2 M
1.084 M/sec
Two mechanisms are proposed:
I.
H2O2 + I– ® H2O + OI–
OI– + H+ ® HOI
HOI + I– + H+ ® I2 + H2O
I2 + I– ® I3–
II.
H2O2 + I– + H+ ® H2O + HOI
HOI + I– + H+ ® I2 + H2O
I2 + I– ® I3–
Which of the following describes a potentially correct mechanism?
A.
Mechanism I with the first step the rate determining step.
B.
Mechanism I with the second step the rate determining step.
C.
Mechanism II with the first step rate determining.
D.
Mechanism II with the second step rate determining.
E.
None of these could be correct.
11.
A first-order reaction is 35% complete at the end of 55 minutes. What is the value of the rate constant?
A.
1.9 × 10–3 min-1
B.
36 min–1
C.
89 min–1
D.
7.8 × 10–3 min–1
E.
none of these
12.
The following initial rate data were found for the reaction 2MnO4– + 5H2C2O4 + 6H+ ® 2Mn2+ + 10CO2 + 8H2O