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Experiment 4
Enthalpy of Chemical Reactions
GRADING RUBRIC
EXPERIMENT 4 – LAB REPORT Worksheet
(80 pts)
Student name: ____Paulina Uribe___
Lab partner name: ___Britney Nguyen___
TA name: ___Rose___
Day & time of the lab: _02/15_
The lab report packet for this experiment should consist of the following in THIS ORDER:
The lab report packet for this experiment should consist of the following:
1.
(10 pts)
IN-lab notebook pages
1.1. Experimental procedure
1.2. Recorded experimental values and the file name (as saved on your USB drive)
1.3. Observations if any were noted
2.
(70 pts) The WORKSHEET
3.1
(22 pts) POST-lab data analysis
3.2
(10 pts) Figures of graphs with captions in the right positions. Tables with captions
3.3
(38 pts) Complete (full sentence) answers to the discussion questions (DQ; Provide well- rounded answers composed with complete sentences for full credit. If you need to refer to any of the data or tables produced during the “Data Analysis” section, clearly indicate their location within your answers for the graders to find them readily.)
Complete this worksheet and turn in your digital lab packet to Canvas. Feel free to adjust space in this document as needed. The tables provided here are only an example of these may look like, feel free to replace the entire tables with your own creations using Excel, etc All tables and figures (graphs) must be accompanied by captions which should be positioned above tables and below figures.
TURN IN the digital copy to Canvas on the due date by 11:59 pm. All electronic material must be completed by the due date to avoid late penalties.
1
P. Sotelo SP2023
Reaction 1
Reaction 2
Reaction 3
Reaction 4
Reaction 5
Time (s)
Temperature °C
Time (s)
Temperature °C
Time (s)
Temperature °C
Time (s)
Temperature °C
Time (s)
Temperature °C
0
21.4
0
20.5
0
21.1
0
20.9
0
20.
15
21.4
15
20.5
15
20.9
15
20.8
15
20.
30
21.3
30
20.4
30
21
30
20.8
30
20.
45
21.3
45
20.4
45
21
45
20.8
45
20.
60
21.3
60
20.4
60
27.7
60
20.9
60
20.
75
21.2
75
20.5
75
33.3
75
20.7
75
20.
90
31.2
90
21.4
90
33.5
90
20.7
90
20.
105
34.6
105
21.4
105
33.4
105
20.7
105
20.
120
34.7
120
21.4
120
33.2
120
21.6
120
22.
135
34.8
135
21.4
135
33.2
135
23
135
35.
150
34.7
150
21.4
150
33
150
23.7
150
38.
165
34.6
165
21.6
165
33
165
24.4
165
38.
180
34.5
180
21.4
180
33
180
25.3
180
39.
195
26.3
195
39.
210
26.9
210
39.
225
27.9
225
3
240
28.5
240
3
255
29
255
38.
270
29.5
270
38.
285
30
285
38.
300
30.4
300
38.
315
30.5
315
38.
330
30.6
330
38.
345
30.9
345
38.
360
30.9
360
38.
375
31.1
375
38.
390
31.2
390
38.
405
31.3
405
37.
420
31.2
420
37.
435
31.1
435
37.
450
31.2
450
37.
465
31.3
465
37.
480
31.2
480
37.
0
20
40
60
80
100
120
140
160
180
200
0
5
10
15
20
25
30
35
40
Reaction 1
Time
Temperature
0
20
40
60
80
100
120
140
160
180
200
19.5
20
20.5
21
21.5
22
Reaction 2
Time
Temperture
Highest temp: 21.6°C 0
20
40
60
80
100
120
140
160
180
200
0
5
10
15
20
25
30
35
40
Reaction 3
Time
Temperature
0
100
200
300
400
500
600
0
5
10
15
20
25
30
35
Reaction 4
Time
Temperature
0
100
200
300
400
500
600
0
5
10
15
20
25
30
35
40
45
Reaction 5
Time
Temperature
Highest temp: 34.8°C Highest temp: 33.5°C Highest temp: 31.3°C Highest temp: 39.2°C 2
P. Sotelo SP2023
3
P. Sotelo SP2023
(22 pts)
POST-LAB DATA ANALYSIS
Post-lab should contain all work done outside of the lab, especially sample calculations for
every type of math operation, as detailed in the DATA ANALYSIS in reference to DQs
. You
may choose to show your work in the post-lab notebook pages or typed in the data analysis
and discussion portions of the worksheet.
PART B: The Reaction of Hydrochloric Acid and Ammonium Hydroxide
The following steps will guide you on how to proceed with data analysis using the software of
your choice, Excel or LoggerPro:
1.
If you choose to use Excel
, open your file (.txt) from Part B in Excel. 4
P. Sotelo SP2023
a.
Open Excel and select the “data” tab.
b.
Select the “From Text” action, and select the desired file to import.
c.
Excel should automatically identify your data as “Delimited”. Ensure that this is the
selected file type and click “Finish”.
d.
Some versions of Excel will import data sets without retaining their numerical values
(your data will not be erased, but Excel will treat numbers as letters). Data cannot be
analyzed in this state. To convert the text into values, select a column, and click “Text to
Columns” under the Data tab. Numbers that are successfully converted to values will be
aligned on the right side of the cell. Generate a new graph
for each reaction.
e.
Highlight the desired data set, select “Insert” from the task bar in the top left, then select
“Insert Scatter”.
f.
From the “Design” tab, you can change the name of an axis by selecting “Add Chart
Element”, then “Axis Titles”.
g.
Ensure that each graph (three total) plots Time on the x-axis and Temperature on the
y-axis.
h.
Identify the maximum temperature value for each reaction and label it on its graph.
i.
Add an appropriate title to each graph by selecting “Add Chart Element”, then “Chart
Title”.
If you choose to use
Logger Pro 3.14,
open the (.txt or .qmbl) file saved on your USB
drive from Part B. To generate a new graph for each reaction:
Select “Insert” from the task bar in the top left, then select “
Graph
”.
o
You can change the name (and corresponding data of) an axis by simply left
-
clicking on it and selecting the desired option from the drop-down menu. To
toggle between the temperature readings from each different reaction, click on the
y-axis title (Temperature) to access the drop-down menu, then select “More” to
see options for each individual run.
o
Ensure that each graph (three total) plots Time on the x-axis and Temperature on
the y-axis.
o
Select “Analyze” and “Statistics” to add a statistics legend to each graph.
o
Add an appropriate title to each graph by right
-clicking on the graph and selecting
“Graph Options”.
o
Copy and paste all three graphs into the R&D section of the report. (2 pts/each) FIGURES (five total) Figure 1:
(insert caption below the figure)
…
5
P. Sotelo SP2023
0
20
40
60
80
100
120
140
160
180
200
0
5
10
15
20
25
30
35
40
Reaction 1
Time
Temperature
Figure 1: The reaction of Hydrochloric acid and Sodium Hydroxide had a maximum temperature
of 34.8°C at 135 seconds.
Figure 2:
…
0
20
40
60
80
100
120
140
160
180
200
19.5
20
20.5
21
21.5
22
Reaction 2
Time
Temperture
Figure 2: The reaction of Sodium Hydroxide and Ammonium Chloride had a maximum
temperature of 21.6°C at 165 seconds.
Figure 3:
…
6
P. Sotelo SP2023
Highest temp:
34.8°C
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Energy =
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%3D
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COLLEGE OF HEALTH SCIENCES
RESULTS AND OBSERVA TIONS:
PARTI: BENEDICTS TEST FOR REDUCING SUGARS
田
TUBE
PATIENT
COLOR
RESULT and
NO.
Before: Blue-green
OBSERVATION
WHITE PRECIPITATE:
1
Normal Patient 1
After: Greenish brown
2
Normal Patient 2
Before: Blue
LIGHT GREEN
After: Green
PRECIPITA TE:
3
WHILTE AND YELLOW
Pathologic Patient 1
Before: Blue
PRECIPITATE:
After: Green
BRICK RED
Before: Blue-green
After: Brick Red
Pathologic Patient 2
PRECIPITATE:
Generalization:
Page 5 of 8
947 words
English (Philippines)
K…
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[please answer with correct answer]
Temperature is a measure of ____
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command
option
General Chemistry II Laboratory Manual, 2019 Revsion
39
Questions:
1) When you set up the temperature probe using Capstone, you did not calibrate it to
read the correct temperature. It's possible that the probe reads temperatures that are
Thi consistently off by 1 or 2°C. Why won't this affect your results for this experiment?
Explain your answer.
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STARTING AMOUNT
esc
C
X
C
2
F2
W
#
3
1000
F3
ADD FACTOR
x( )
$
4
1
97.9
FS
de in
%
5
2
Convert 23.4 kJ to calories
2.34 x 104
t
4184
kcal
6
P
0.001
J
4.184
COMEC
DOLL
ANSWER
&
7
9.79 × 104
cal
00
8
RESET
FO
2
23.4
(
5590
A
FIT
120
Jan 21
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DENSITY EXPERIMENT
HOMEWORK
1. A few mls of an insoluble liquid is added to water. The density of the
insoluble liquid is 1.8 g/L. What will happen upon mixing? Which layer
will be on top?
2. Why does ice float on water?
3. What would you use to measure the mass of a solid?
4. What would you use to measure the volume of a liquid?
5. Density can be used to:
6. Is density a physical property or a chemical property?
7. A meniscus must be read at the top of the dip, the bottom of the
dip, or above the dip?
Comment
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rch
F9
* CO
8
Part A
Units
Specify the units of your answer. Review a list of acceptable units.
No credit lost. Try again.
P Pearson
rson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Pmissions | Contact Us |
F10
(
9
Convert 8.8 kcal to its value in calories.
Express your answer to two significant figures and include the appropriate units.
abbreviations for the units.
8800
F11
μA
)
0
Bb
→ C
F12
LÉ
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placed in the test tube, determine the percent KCLO3 present within the unknown.
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-2
-1
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5NO2
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R9
555
5NO3
+ 2Mn+²
+ 3H2O
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PERFORMANCE TASK 4.4 (CHEMICAL EQUATION)
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GO REACT!
DIRECTIONS:
1. Write the symbols to complete chemical equation inside the box.
2. Balance the chemical equations by writing its coefficient on the space provided beside the box.
3. Determine the type of reaction in each item.
A. Chemical Reactions:
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Mg +
Type of Reaction:
2. Sodium reacts with copper sulfate and forms sodium sulfate and copper.
2
Na
+ C² 99
→
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Type of Reaction:
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HgO
2
+
Type of Reaction:
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Type of Reaction:
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Use z-score tables or technology to answer the following questions.
a) What percentage of chemical reactions occur between 41 s and 43 s?
b) What percentage of chemical reactions occur in less than 39 s?
Page 5
STATISTICS-REVIEW ASSIGNMENT
c) If 200 experiments are performed in the same manner as above, how many can the scientist
expect to have chemical reactions that take longer than 43 s?
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1-23. The concentration of sugar (glucose, C6H₁2O6) in human blood
ranges from about 80 mg/100 mL before meals to 120 mg/100 mL
after eating. Find the molarity of glucose in blood before and after
eating.
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- older. Or import from another browser. Import favorites [Review Topics] [References] Some fuel-efficient hybrid cars are rated at 55.0 miles per gallon of gasoline. Calculate the energy used to drive 9.00 miles if gasoline produces 48.0 kJ/g and the density of gasoline is 0.737 g/cm. (1.00 gal = 3.785 L) Energy = kJ %3D Submit Answer Retry Entire Group 3 more group attempts remaining 640 PMarrow_forwardAnswer 1 to 5 Question Asap plssarrow_forwardRoutine Chemical Tests for Urine - Word Table Tools Decy Joy Garriel Table Design O Tell me what you want to do 2 Share File Home Insert Draw Design Layout References Mailings Review View Help Layout X Cut P Find Calibri (Body) 12 A A Aa v AaBbCcD AaBbCcDc AaBbCcDc AaBbC AaBbCcC AaBbC AaBbCcD EE Copy ab. Replace Paste BIU v abe X, x A v aly - A - I Normal No Spacing I No Spac. Heading 1 Heading 2 Heading 3 Heading 4 A Select Format Painter Clipboard Font Paragraph Styles Editing COLLEGE OF HEALTH SCIENCES RESULTS AND OBSERVA TIONS: PARTI: BENEDICTS TEST FOR REDUCING SUGARS 田 TUBE PATIENT COLOR RESULT and NO. Before: Blue-green OBSERVATION WHITE PRECIPITATE: 1 Normal Patient 1 After: Greenish brown 2 Normal Patient 2 Before: Blue LIGHT GREEN After: Green PRECIPITA TE: 3 WHILTE AND YELLOW Pathologic Patient 1 Before: Blue PRECIPITATE: After: Green BRICK RED Before: Blue-green After: Brick Red Pathologic Patient 2 PRECIPITATE: Generalization: Page 5 of 8 947 words English (Philippines) K…arrow_forward
- [please answer with correct answer] Temperature is a measure of ____arrow_forwardcommand option General Chemistry II Laboratory Manual, 2019 Revsion 39 Questions: 1) When you set up the temperature probe using Capstone, you did not calibrate it to read the correct temperature. It's possible that the probe reads temperatures that are Thi consistently off by 1 or 2°C. Why won't this affect your results for this experiment? Explain your answer.arrow_forwardSTARTING AMOUNT esc C X C 2 F2 W # 3 1000 F3 ADD FACTOR x( ) $ 4 1 97.9 FS de in % 5 2 Convert 23.4 kJ to calories 2.34 x 104 t 4184 kcal 6 P 0.001 J 4.184 COMEC DOLL ANSWER & 7 9.79 × 104 cal 00 8 RESET FO 2 23.4 ( 5590 A FIT 120 Jan 21 del +arrow_forward
- File Edit + Add Slide Insert Slide H View 125% Zoom Format + Add Page Play Keynote Live Table ¶ ✓ Insert Chart # Table Chart APR 9 T Text DENSE HW (15) ~ NEW DENSITY (1) ► T Text Shape Media Shape Comment Media DENSITY EXPERIMENT HOMEWORK 1. A few mls of an insoluble liquid is added to water. The density of the insoluble liquid is 1.8 g/L. What will happen upon mixing? Which layer will be on top? 2. Why does ice float on water? 3. What would you use to measure the mass of a solid? 4. What would you use to measure the volume of a liquid? 5. Density can be used to: 6. Is density a physical property or a chemical property? 7. A meniscus must be read at the top of the dip, the bottom of the dip, or above the dip? Comment MacBook Air Ne Collaba QUEENSBOROUGH SU COMMUNITY COLLEGEarrow_forwardGive only typing answer with explanation and conclusionarrow_forwardPhthalein Dye Test Chemical Reaction Balanced equationarrow_forward
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