25 Questions
Question 1
A group of students compiled the data shown in data table 1 below. What is the exact order for IO3-(aq) to 2 decimal places?
Table 1. Raw experimental data
Experiment #
[IO3-]
Concentration (M)
[I-] Concentration (M)
[H+] concentration (M)
[H3AsO3] concentration (M)
[I- starch complex] concentration (M)
Average time (s)
1
0.005
0.05
2.0 x 10-5
0.0015
5.0 x 10-4
22.12
2
0.010
0.05
2.0 x 10-5
0.0015
5.0 x 10-4
86.84
3
0.005
0.10
2.0 x 10-5
0.0015
5.0 x 10-4
5.35
4
0.005
0.05
4.0 x 10-5
0.0015
5.0 x 10-4
2.65
Show explanation and choose from the following answers:
A XXXXXXXXXXB XXXXXXXXXXC XXXXXXXXXXD. – XXXXXXXXXXE XXXXXXXXXXF XXXXXXXXXXG XXXXXXXXXXH XXXXXXXXXXI. 1.97
J XXXXXXXXXXK XXXXXXXXXXL XXXXXXXXXXM XXXXXXXXXXN XXXXXXXXXXO XXXXXXXXXXP. 0.88
Question 2:
A group of students compiled the data shown in data table 1 below. What is the exact order for I-(aq) to 2 decimal places?
Table 1. Raw experimental data: Below
Experiment #
[IO3-]
Concentration (M)
[I-] Concentration (M)
[H+] concentration (M)
[H3AsO3] concentration (M)
[I- starch complex] concentration (M)
Average time (s)
1
0.005
0.05
2.0 x 10-5
0.0015
5.0 x 10-4
22.12
2
0.010
0.05
2.0 x 10-5
0.0015
5.0 x 10-4
86.84
3
0.005
0.10
2.0 x 10-5
0.0015
5.0 x 10-4
5.35
4
0.005
0.05
4.0 x 10-5
0.0015
5.0 x 10-4
2.65
Show explanation and choose from the following answers:
A XXXXXXXXXXB XXXXXXXXXXC XXXXXXXXXXD XXXXXXXXXXE XXXXXXXXXXF XXXXXXXXXXG XXXXXXXXXXH XXXXXXXXXXI. 1.97
J XXXXXXXXXXK XXXXXXXXXXL XXXXXXXXXXM XXXXXXXXXXN XXXXXXXXXXO XXXXXXXXXXP. 0.97
Question 3:
A group of students compiled the data shown in data table 1 below. What is the exact order for H+(aq) to 2 decimal places?
Table 1. Raw experimental data.
Experiment #
[IO3-]
Concentration (M)
[I-] Concentration (M)
[H+] concentration (M)
[H3AsO3] concentration (M)
[I- starch complex] concentration (M)
Average time (s)
1
0.005
0.05
2.0 x 10-5
0.0015
5.0 x 10-4
22.12
2
0.010
0.05
2.0 x 10-5
0.0015
5.0 x 10-4
86.84
3
0.005
0.10
2.0 x 10-5
0.0015
5.0 x 10-4
5.35
4
0.005
0.05
4.0 x 10-5
0.0015
5.0 x 10-4
2.65
Show explanation and choose from the following answers:
A XXXXXXXXXXB XXXXXXXXXXC XXXXXXXXXXD XXXXXXXXXXE XXXXXXXXXXF XXXXXXXXXXG XXXXXXXXXXH XXXXXXXXXXI. 1.08
J XXXXXXXXXXK XXXXXXXXXXL XXXXXXXXXXM XXXXXXXXXXN XXXXXXXXXXO XXXXXXXXXXP. 1.97
Question 4:
A group of students compiled the data shown in data table 1 below. What is the overall order for this chemical reaction?
Table 1. Raw experimental data
Experiment #
[IO3-]
Concentration (M)
[I-] Concentration (M)
[H+] concentration (M)
[H3AsO3] concentration (M)
[I- starch complex] concentration (M)
Average time (s)
1
0.005
0.05
2.0 x 10-5
0.0015
5.0 x 10-4
22.12
2
0.010
0.05
2.0 x 10-5
0.0015
5.0 x 10-4
86.84
3
0.005
0.10
2.0 x 10-5
0.0015
5.0 x 10-4
5.35
4
0.005
0.05
4.0 x 10-5
0.0015
5.0 x 10-4
2.65
Show explanation and choose from the following answers:
A XXXXXXXXXXB. 8 C XXXXXXXXXXD XXXXXXXXXXE XXXXXXXXXXF XXXXXXXXXXG XXXXXXXXXXH. 7 I. 6
J XXXXXXXXXXK XXXXXXXXXXL XXXXXXXXXXM XXXXXXXXXXN. 3 O. 1 P XXXXXXXXXXQ. 5
Question 5:
A group of students compiled the data shown in data table 1 below. Using the exact order to 2 decimal places for each reactant calculate the average rate constant (k)
Table 1. Raw experimental data.
Experiment #
[IO3-]
Concentration (M)
[I-] Concentration (M)
[H+] concentration (M)
[H3AsO3] concentration (M)
[I- starch complex] concentration (M)
Average time (s)
1
0.005
0.05
2.0 x 10-5
0.0015
5.0 x 10-4
22.12
2
0.010
0.05
2.0 x 10-5
0.0015
5.0 x 10-4
86.84
3
0.005
0.10
2.0 x 10-5
0.0015
5.0 x 10-4
5.35
4
0.005
0.05
4.0 x 10-5
0.0015
5.0 x 10-4
2.65
Show explanation and choose from the following answers:
A. 90,071, XXXXXXXXXXB. 70,941,734 C. 73,589, XXXXXXXXXXD. 66,648, XXXXXXXXXXE. 58,075,217
F. 60,407, XXXXXXXXXXG. 78,946, XXXXXXXXXXH. 68,746, XXXXXXXXXXI. 82,029,857
J. 64,019, XXXXXXXXXXK. 88,470, XXXXXXXXXXL. 86,710, XXXXXXXXXXM. 76,846, XXXXXXXXXXN. 80,275,890
O. 62,019, XXXXXXXXXXP. 84,077,208
Question 6:
A group of students compiled the data shown in data table 1 below. What is the units for K?
Table 1. Raw experimental data. Below
Experiment #
[IO3-]
Concentration (M)
[I-] Concentration (M)
[H+] concentration (M)
[H3AsO3] concentration (M)
[I- starch complex] concentration (M)
Average time (s)
1
0.005
0.05
2.0 x 10-5
0.0015
5.0 x 10-4
22.12
2
0.010
0.05
2.0 x 10-5
0.0015
5.0 x 10-4
86.84
3
0.005
0.10
2.0 x 10-5
0.0015
5.0 x 10-4
5.35
4
0.005
0.05
4.0 x 10-5
0.0015
5.0 x 10-4
2.65
Show explanation and choose from the following answers:
A. M7 s XXXXXXXXXXB. M-8 s-1 C. M-1 s XXXXXXXXXXD. M-4 s-1 E. M2 s-1
F. M3 s XXXXXXXXXXG. M-2 s XXXXXXXXXXH. M-6 s-1 I. M-2 s-2
J. M-3 s-1 K. M-7 s XXXXXXXXXXL. M6 s-1 M. M s-1 N. M4 s-1
O. M-5 s-1 P. M5 s-1
Question 7:
Suppose a group of students put 2.92 grams of an unknown solid acid into a 250-mL Erlenmeyer flask and filled it up to the mark with deionized water. The students then proceeded to make 250-mL of a 0.18 M NaOH(aq) solution in another 250-mL Erlenmeyer flask. The students took a 22-mL aliquot of the acid solution and transfer it to another 250-mL Erlenmeyer flask. The students were given a pH meter that was already cali
ated by their teaching assistant (T.A.) and they got the following result shown in the table below. How many mmoles of NaOH(aq) did it take to reach the equivalence point?
Table 2. Titration curve data
VNaOH
(mL)
pH
VNaOH
(mL)
pH
0
2.65
8.00
6.32
1
3.29
8.10
10.45
2
3.63
8.20
10.93
3
3.88
8.30
11.16
4
4.10
8.40
11.30
5
4.32
8.50
11.41
6
4.57
8.60
11.50
7.00
4.93
8.70
11.57
7.10
4.98
8.80
11.63
7.20
5.03
8.90
11.68
7.30
5.09
9
11.73
7.40
5.16
10
12.03
7.50
5.24
11
12.20
7.60
5.33
12
12.31
7.70
5.45
13
12.39
7.80
5.60
14
12.46
7.90
5.83
15
12.52
Show explanation and choose from the following answers:
A XXXXXXXXXXB XXXXXXXXXXC XXXXXXXXXXD XXXXXXXXXXE XXXXXXXXXX
F XXXXXXXXXXG XXXXXXXXXXH XXXXXXXXXXI XXXXXXXXXX
J XXXXXXXXXXK XXXXXXXXXXL XXXXXXXXXXM XXXXXXXXXXN. 0.028
O XXXXXXXXXXP. 3.031
Question 8:
Suppose a group of students put 2.92 grams of an unknown solid acid into a 250-mL Erlenmeyer flask and filled it up to the mark with deionized water. The students then proceeded to make 250-mL of a 0.18 M NaOH(aq) solution in another 250-mL Erlenmeyer flask. The students took a 22-mL aliquot of the acid solution and transfer it to another 250-mL Erlenmeyer flask. The students were given a pH meter that