Science
CHEM 151 Effect of 0.1 M NaOH on light output of Activated Green Glow Sticks Lab Report

CHEM 151

CHEM

Question Description

I’m working on a Chemistry exercise and need support.

itts online chemistry lab assignment I will post the document it does not need any lab work everything is written in the paper please do it in a separate paper as its asked if you have anything your not understanding from the paper don't hesitatet to ask me tthankyou

Unformatted Attachment Preview

CHEM 151 Online Assignment 1| 1 CHEM 151 Online Assignment 1 Your TA’s name: Your name: Lab section: Your email: GRADE ____ /25 p This assignment is due before 11 pm on Friday March 27th, 2020. The deadline is absolute. A zero will automatically apply to any late submission. You are being given more than sufficient time to complete this assignment, but do not procrastinate. If you put this off until the last minute, then for some reason cannot complete the assignment on time, the consequences are of your making. The only acceptable excuses are situations such as illness of significant duration, in which case proper documentation must be presented, and the Dean of Students notified. All work must be very neat and organized. If you need to organize your thoughts, please use a separate sheet of paper. 1. Graphing (4 p). Assume we have two students, Student A and Student B, both studying the effect of 0.1 M sodium hydroxide (NaOH) on the light output of activated green glow sticks. Both are using the same green glow sticks and start with the same volume of activated glow stick solution. Further, the same emission spectrometer is employed to capture the intensity data (for this lab, intensity is treated as unit-less). Student A’s data is presented to the left, while Student B’s appears at right. Student A Student B Volume (μL) of 0.1 M NaOH Added Intensity at λmax = 535 nm Volume (μL) of 0.1 M NaOH Added Intensity at λmax = 535 nm 0.00 100 200 300 400 500 600 700 800 900 1000 - 0.091 0.088 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 - 0.00 20 40 60 80 100 120 140 160 180 200 220 0.088 0.581 0.772 0.512 0.222 0.091 0.049 0.023 0.009 0.005 0.001 0.000 In EXCEL plot the data (Intensity vs. Volume) for Student A. Then, separately, do the same for Student B. Paste in both graphs below. Don’t forget to properly title the graphs and label the axes. 151 Online Assignment v1.0 MY © 2020 3-18-20 Chem Think Technical Press CBC UofA CHEM 151 Online Assignment 1| 2 2. Student A (2 p). Looking at just Student A’s results, what can you conclude about the effect of 0.1 M NaOH on the light output of an activated green glow stick solution? 3. Student B (2 p). Now considering just Student B’s results, what can you conclude about the effect of 0.1 M NaOH on the light output of an activated green glow stick solution? 4. Student A vs. B (2 p). Finally, compare the experimental approach of Student A versus Student B. What was different? Which approach is superior and state exactly why? 151 Online Assignment v1.0 MY © 2020 3-18-20 Chem Think Technical Press CBC UofA CHEM 151 Online Assignment 1| 3 5. Graphing (4 p). A study seeks to explore the effect of sodium acetate on the light output of activated orange glow sticks. The experimenter decides to use a 0.01 M solution of sodium acetate in methanol and add the methanolic sodium acetate solution in 25 μL increments. A single orange glowstick is activated and opened, with 2.75 mL of activated glowstick solution pipetted into each of three separate 1-dram vials, labeled Vial #1, Vial #2 and Vial #3. The same emission spectrometer is employed to capture all the intensity data (intensity is treated as unit-less). All three vials were then capped, and initial emission spectra were taken to confirm equivalent output (intensity = 0.111) and determine a λmax of 484 nm. To Vial #1, the experimenter introduced every 60 seconds 25 µL of 0.01 M methanolic sodium acetate, immediately recapped, mixed by four gentle inversions, and then recorded the emission spectrum. Interleaved with this, the experimenter added every 60 seconds 25 µL of pure methanol into Vial #2, immediately recapped, mixed by four gentle inversions, and then recorded the emission spectrum. That is, starting a t = 0 seconds, Vial #1 underwent the above described methanolic sodium acetate addition/spectrometer reading, with Vial #2 undergoing methanol addition/spectrometer reading starting at t = 30 seconds, then at t = 60 seconds, it was back to Vial #1 and methanolic sodium acetate, and so forth. This reciprocating cycle was repeated for a total of 12.5 minutes (750 seconds). At 12.5 minutes the emission spectrum for Vial #3 was recorded. Then, 25 µL of methanolic sodium acetate was added into Vial #3 with mixing and immediate recording of the emission spectrum. The resulting data for Vial #1, Vial #2 and Vial #3 are presented below. Time (seconds) Initial 0 60 120 180 240 300 360 420 480 540 600 660 720 Vial #1 Vial #2 Vial #3 Volume (μL) of Methanolic Sodium Acetate Added 0 25 50 75 100 125 150 175 200 225 250 275 300 325 Volume (μL) of Pure Methanol Added 0 25 50 75 100 125 150 175 200 225 250 275 300 325 Volume (μL) of Methanolic Sodium Acetate Added 0 0 25 Intensity at λmax = 620 nm Time (seconds) 0.111 0.611 0.874 1.021 1.011 0.801 0.517 0.313 0.156 0.044 0.014 0.005 0.000 0.000 Initial 30 90 150 210 270 330 390 450 510 570 630 690 750 Intensity at λmax = 620 nm 0.111 0.105 0.099 0.093 0.087 0.081 0.075 0.069 0.063 0.058 0.052 0.046 0.040 0.034 Time (seconds) Initial 750 750 In EXCEL plot the data (Intensity vs. Volume) for Vial #1. Then, separately, do the same for Vial #2. Paste in both graphs below. 151 Online Assignment v1.0 MY © 2020 3-18-20 Chem Think Technical Press CBC UofA Intensity at λmax = 620 nm 0.111 0.099 0.599 CHEM 151 Online Assignment 1| 4 6. Vial #1 (2 p). Looking at just the Vial #1 results, what can you conclude about the effect of 0.01 M methanolic sodium acetate on the light output of an activated orange glow stick solution? 7. Vial #2 (2 p). Now considering just the Vial #2 results, what are the conclusions? 8. Vial #3 (2 p). Considering just the Vial #3 results, what are the conclusions? 151 Online Assignment v1.0 MY © 2020 3-18-20 Chem Think Technical Press CBC UofA CHEM 151 9. Vials #1, #2 and #3 (5 p). Finally, consider the data OF ALL THREE vials. What are the conclusions? 151 Online Assignment v1.0 MY © 2020 3-18-20 Chem Think Technical Press CBC UofA Online Assignment 1| 5 ...
Purchase answer to see full attachment
Student has agreed that all tutoring, explanations, and answers provided by the tutor will be used to help in the learning process and in accordance with Studypool's honor code & terms of service.

Final Answer

Attached.

1. Graphing
Student A
(Volume (μL) of 0.1 M NaOH Added) Intensity at λ max = 535 nm
0
0.091
100
0.088
200
0.001
300
0
400
0
500
0
600
0
700
0
800
0
900
0
1000
0
-

Intensity versus Volume of NaOH
0.1

Intensity at 535nm

0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02

0.01
0
0

2

4

6

8

10

12

Volume of 0.1M NaOH (μL)

Vial #1
Time (seconds)
Initial

Volume (μL) of MethanolicIntensity
Sodium Acetate
at λmaxAdded
= 620 nm
0
0.111
0
25
0.611
60
50
0.874
120
75
1.021

14

180
240
300
360
420
480
540
600
660
720

100
125
150
175
200
225
250
275
300
325

1.011
0.801
0.517
0.313
0.156
0.044
0.014
0.005
0
0

Intensity versus Volume of Sodium Methanolic
Acetate
Intensity at 620nm

1.2
1
0.8
0.6
0.4

0.2
0
0

50

100

150

200

250

Volume of Sodium Methabolic Acetate

(Volume (μL) of 0.1 M NaOH Added)
0
20
40
60
80
100
120
140
160
180
200
220

Student B
Intensity at λmax = 535 nm
0.088
0.581
0.772
0.512
0.222
0.091
0.049
0.023
0.009
0.005
0.001
0

Intensity versus volume of NaOH
0.9

Intensirty at 535nm

0.8
0.7
0.6
0.5
0.4
0.3

0.2
0.1
0
0

50

100

150

200

250

Volume of 0.1M NaOH (μL)

Vial #2
Time (seconds)
Initial

Volume (μL) of Pure Methanol Added
Intensity at λmax = 620 nm
0
0.111
30
25
0.105
90
50
0.099
150
75
0.093

210
270
330
390
450
510
570
630
690
750

100
125
150
175
200
225
250
275
300
325

0.087
0.081
0.075
0.069
0.063
0.058
0.052
0.046
0.04
0.034

Intensity versus Volume of Pure Methanol added

Sodium Methanolic
0.12

Intensity at 620nm

0.1
0.08
0.06
0.04
0.02
0
250

ethabolic Acetate

300

350

0

50

100

150

200

Volume of Pure Methanol added (

of Pure Methanol added

200

250

re Methanol added (μL)

300

350


CHEM 151

Online Assignment 1| 1

CHEM 151 Online Assignment 1
Your TA’s name:

Your name:

Lab section:

Your email:

GRADE ____ /25 p
This assignment is due before 11 pm on Friday March 27th, 2020. The deadline is absolute. A zero will automatically apply to any late submission.
You are being given more than sufficient time to complete this assignment, but do not procrastinate. If you put this off until the last minute, then
for some reason cannot complete the assignment on time, the consequences are of you...

puritymaruga (7976)
UIUC

Anonymous
I was on a very tight deadline but thanks to Studypool I was able to deliver my assignment on time.

Anonymous
The tutor was pretty knowledgeable, efficient and polite. Great service!

Anonymous
Heard about Studypool for a while and finally tried it. Glad I did caus this was really helpful.

Studypool
4.7
Trustpilot
4.5
Sitejabber
4.4