Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
Related questions
Question
Number 1 in this lab. Using the data table sheet how do you find the initial rate in M/s
Transcribed Image Text:7:55
A
B
D
1
Time
Pressure (kPa)
temp = 20.8C
2
99.85
3
5
99.88
10
99.88
15
100
20
100.05
7
25
100.17
8
30
100.23
9
35
100.4
10
40
100.58
11
45
100.64
12
50
100.75
13
55
100.92
14
60
101.04
15
65
101.15
16
70
101.33
17
75
101.44
18
80
101.56
19
85
101.67
20
90
101.85
21
95
102.08
22
100
102.25
23
105
102.43
24
110
102.6
25
115
102.77
26
120
102.95
27
125
103.06
28
130
103.3
29
135
103.47
30
140
103.64
31
145
103.82
32
150
103.99
33
155
104.22
34
160
104.33
35
165
104.57
36
170
104.8
37
175
105.03
38
180
105.2
39
185
105.43
40
190
105.51
41
195
105.84
42
200
106.07
43
44
45
46
47
Sheet1
Sheet2
Sheet3
+
![7:54
Rate Study H202.pdf
3. Set up data collection - connect to Chromebook. Collect data for about 200 seconds.
4. Prepare Run 1 and collect pressure data:
a. Fill a clean 4ml test tube with your H,O, solution. Stopper and place in water
bath.
b. Fill a clean 4 ml test tube with the KI and H,0 volumes. Stopper and place in
water bath.
c. After several minutes, all reagents should be the same temperature.
d. Mix the reagents in a 18x150 mm test tube. Quickly connect the gas pressure
sensor, immerse in the water bath and start collecting data.
e. When data collection is complete, dispose of products in waste jug.
f. Your graph should start to develop a distinct linear region after about 100
seconds. If satisfied, determine your best linear region between 100-200
second, find the slope and record it as the initial rate of reaction.
5. Repeat #4 for Runs 2 and 3.
Data Table:
Run
mL
Initial Rate
mL
KI
mL
Temp
(°C)
Initial Rate
[H,O,]
After
mix
[1-]
After
Ra
H,O,
H,0
(kPals)
(mol/L*s)
cons
mix
1
4.00
1.00
2
4.00
0.50
0.50
3
2.00
1.00
2.00
Avg
Calculations and Question:
1. Calculate the initial rate for each run in (M/s) or (mol/L*s) using PV=nRT.
2. Calculate [H,O,] and [l-] for each run.
3. Show a calculation or write and argument for the order of the H,O, and KI reaction.
4. Show the rate law expression generated from your work in #3.
5. Calculate the rate constant, k, for each run. Then determine an average.
6. Run 1,2 and 3 should be close for room temperature. Determine the average
temperature.
7. The following mechanism has been proposed for this reaction:
H,O, + I-→ 10- + H,O
H,O, + 10- → I- + H,0 + O,
Does this seem correct/valid? Which step would be the rate determining step? Explai
이8 | 8 |](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7b0e53ca-63fc-4ad5-87d8-e762d3c4ca39%2F0d952b74-6143-4bd5-8012-b35cba497925%2Fp4ldkm_processed.jpeg&w=3840&q=75)
Transcribed Image Text:7:54
Rate Study H202.pdf
3. Set up data collection - connect to Chromebook. Collect data for about 200 seconds.
4. Prepare Run 1 and collect pressure data:
a. Fill a clean 4ml test tube with your H,O, solution. Stopper and place in water
bath.
b. Fill a clean 4 ml test tube with the KI and H,0 volumes. Stopper and place in
water bath.
c. After several minutes, all reagents should be the same temperature.
d. Mix the reagents in a 18x150 mm test tube. Quickly connect the gas pressure
sensor, immerse in the water bath and start collecting data.
e. When data collection is complete, dispose of products in waste jug.
f. Your graph should start to develop a distinct linear region after about 100
seconds. If satisfied, determine your best linear region between 100-200
second, find the slope and record it as the initial rate of reaction.
5. Repeat #4 for Runs 2 and 3.
Data Table:
Run
mL
Initial Rate
mL
KI
mL
Temp
(°C)
Initial Rate
[H,O,]
After
mix
[1-]
After
Ra
H,O,
H,0
(kPals)
(mol/L*s)
cons
mix
1
4.00
1.00
2
4.00
0.50
0.50
3
2.00
1.00
2.00
Avg
Calculations and Question:
1. Calculate the initial rate for each run in (M/s) or (mol/L*s) using PV=nRT.
2. Calculate [H,O,] and [l-] for each run.
3. Show a calculation or write and argument for the order of the H,O, and KI reaction.
4. Show the rate law expression generated from your work in #3.
5. Calculate the rate constant, k, for each run. Then determine an average.
6. Run 1,2 and 3 should be close for room temperature. Determine the average
temperature.
7. The following mechanism has been proposed for this reaction:
H,O, + I-→ 10- + H,O
H,O, + 10- → I- + H,0 + O,
Does this seem correct/valid? Which step would be the rate determining step? Explai
이8 | 8 |
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