This page is to find appropriate information in regards to Lab Reports and in-class activities, specifically related to format and data.

CHS Lab Report Format (updated 2012)


CHS Chemistry Lab Report Rubric (updated 2014)


Composition of Pennies Lab - ROUGH DRAFT DUE 9/27. Final Copy Due Date TBA

Class Data Tables (see table on bottom of file for your class)


Template Period 1



Template Period 3



Template Period 5



Template Period 7



Lab Questions (Answer in Conclusion Section)
1) The composition of the penny changed significantly once (not counting the war-era steel pennies). According to your class density data, when did this change occur?
2) Now look at your class mass data. According to that data, when did this change occur?
Note: If you are unable to make a determination based off of Q1 or Q2, simply describe why you cannot.
3) Does your answer to Q1, Q2, or both match up with the known history of the penny? (Requires research!)
3a) What was the original percent composition of the Lincoln-style penny (1909) and what is the composition today?
4) Why would the density and/or mass change so dramatically as the metals used to make the penny changed?



Identification of Materials Lab
List of potential materials below. There was no "official" lab worksheet. There is 9 unknown blocks.
Potential Identities all in g/cm3.

Acrylic - 1.16 - 1.19
Aluminum - 2.70
Brass - 8.0
Bronze - 8.5
Cadmium - 8.69
Cobalt - 8.86
Copper - 8.9 - 8.96
Delrin - 1.41
Latex - 0.92-.96
Magnesium - 1.74
Maple - 0.50 - 0.67
Nylon - 1.13
Oak - 0.6 - 0.9
Pine - 0.35 - 0.6
Polystyrene - 1.06
Poplar - 0.35 - 0.5
PVC - 1.39 - 1.42
Pyrex - 2.23
Rubber - 1.13-1.20
Scandium - 2.99
Steel - 7.6
Strontium - 2.64
Teflon - 2.20
Zinc - 7.14



_
Simple Stoichiometry Lab (Period 1 Only)

Use the lab file to complete your report. Include the calculations, analysis, and conclusions (answers to questions) for both trials.

Empirical Formula of Magnesium Oxide Lab (Periods 4, 5 and 7)

The following file contains the APPROXIMATE procedure. We did not complete every step in the procedure listed in this file so do not copy and paste!


Your lab report will include the following:
Introduction
Safety
Materials
Procedure
Data
Analysis/Calculations
- Remember to include the analysis and calculations of BOTH trials!
Conclusion
1) The actual formula for magnesium oxide is MgO. If your empirical formula does NOT match the actual formula, explain why you think this occurred. If it does, explain what you could do to confirm the result.

Hydrated Compound Formula Determination - Due February 26th
The packet below is the same one from the lab. None of the pre-lab questions need to be answered for your report (though you can include them in your Introduction if you feel it is necessary).


Analysis:
Your analysis will include how you determined all of the values for your data table for Trial 1 and Trial 2 as well as the ratio calculation that determined the formula (or # of H2O which is Question 1). Your error includes the % Error calculations for Trial 1 and 2 as well as explanation as how you can reduce your error (this is Question 4).

Conclusion:
Include a sentence or two regarding your analysis and error calculations for the formula of the compound. Then answer Questions 2, 3, 5 then 1 and 2 of Real World Chemistry and include those in a coherent manner and not simply bullet points or a list of answers.


Rutherford Simulation Lab Report - Due BEFORE Thanksgiving Week: Rough Draft 11/18, FINAL DRAFT 11/20.
The lab packet can be found below. If you take anything out of there for use in your background/conclusion, CITE IT and REFERENCE IT! (The URL better link back here!)


Additional Questions - answer and use in your conclusion and/or analysis
If we had 1 roll and HIT, what would the diameter of the target marble be? What if we had 1 roll and MISSED?
What did did we have to adjust (and why did we have to) the "Probability Equation A" in our calculation of the diameter for the yellow and black marbles?

Unit 3 Packet Number 1 - Isotopes
PrimordialEvenIsotopes.png
PrimordialOddIsotopes.png

Heating Curve of Water Lab - Conclusion Questions
Graph the Data Below:
Time
Temp
0
-1.5
0.5
-1.5
1
-2
1.5
-2
2
-2
2.5
-2
3
-2
3.5
0
4
0
4.5
0
5
1
5.5
1
6
0
6.5
3
7
7
7.5
9.5
8
12
8.5
15
9
16
9.5
20
10
25
10.5
31
11
35
11.5
42
12
48
12.5
54
13
60
13.5
65
14
69
14.5
74
15
79
15.5
83
16
87
16.5
91
17
95
17.5
97.5
18
99
18.5
99.5
19
99
19.5
100
20
100
20.5
100
21
100
21.5
100
22
99.5
22.5
99.5
23
99
Label the Following on the graph itself
1) Solid, Melting Point, Liquid, Boiling Point, Gas
2) Highlight RED the location on the graph where molecules are moving the slowest
3) Highlight GREEN the location on the graph where molecules are moving the fastest

Answer the questions on the back of the graph
1) Which axis on the graph normally contains the independent variable? Why do you think this is so?

2) Explain what is happening to the water molecules in the flat areas of your line on your graph during the phase changes from solid to liquid and liquid to gas. Utilize concepts of kinetic and potential energy.

3) When the ice is melting is it releasing heat or absorbing heat? Explain.

4) If you put the liquid water into the freezer and recorded its temperature as it refroze, would it be absorbing or releasing heat? Explain.

Materials Identification Lab - Lab Report Due 10/23/2015
Templates Below
File Not Found
File Not Found


File Not Found
File Not Found


File Not Found
File Not Found


File Not Found
File Not Found


Lab Report Questions (answer in narrative form)
For what blocks did you have to resort to another source for identification (internet, pictures, etc.) of the material? What does this tell you about the usefulness of observation during the course of the lab?

Identification of Materials Lab
List of potential materials below. There was no "official" lab worksheet. There is 9 unknown blocks.
Potential Identities all in g/cm3.

Acrylic - 1.16 - 1.19
Aluminum - 2.70
Brass - 8.0
Bronze - 8.5
Cadmium - 8.69
Cobalt - 8.86
Copper - 8.9 - 8.96
Delrin - 1.41
Latex - 0.92-.96
Magnesium - 1.74
Maple - 0.50 - 0.67
Nylon - 1.13
Oak - 0.6 - 0.9
Pine - 0.35 - 0.6
Polystyrene - 1.06
Poplar - 0.35 - 0.5
PVC - 1.39 - 1.42
Pyrex - 2.23
Rubber - 1.13-1.20
Scandium - 2.99
Steel - 7.6
Strontium - 2.64
Teflon - 2.20
Zinc - 7.14

Composition of Pennies Lab and Report - All Periods


DUE DATES: Rough Draft - 9/30 (Bring in TWO printed copies)

Final Copy: 10/2
Below will be an EXCEL file of each period's data. Be sure to copy the correct data table as all the classes completing this lab will be utilizing the same file!

File Not Found
File Not Found


The following questions must be answered as they will be part of your lab report conclusion section (more on that to follow)
1) The composition of the penny changed significantly once (not counting the war-era steel pennies). According to your density data, when did this change occur and does it match up with history?
1a) *Does your research of this change support your data?*
2) What was the original percent composition of the Lincoln-style penny (1909) and what is the composition today?

The following questions are for groups who cannot determine the change based on density alone.
3) What information can you use to determine when the change occurred since density is inconclusive?
4) When did this change occur? *Does research of this change support this set of data?*

Lab Handout: Scan or .pdf of lab handout will be provided for use in writing the lab report.

Lab Report Template: .pdf files will be uploaded upon request
File Not Found
File Not Found


File Not Found
File Not Found


File Not Found
File Not Found


File Not Found
File Not Found


Determining Absolute Zero Lab - All Periods
Note: The individual Excel files that contain the graphs will be posted as they are completed.

Lab Handout

Lab Template

Graphs
Period 1

Period 3

Period 5

Period 7

Your analysis section will include 1) the graph and 2) the calculation of absolute zero based on the equation of the "best fit line" on the graph.

Your conclusion section will include the three conclusion questions in the lab handout above.



Magnesium Oxide Lab Periods 1 and 5
Note: We did not follow the procedure exactly as the document below specified. Be sure to only report the procedure as you completed it in class. You do not need to answer any pre- or post-lab questions that show up other than those we discussed in class together.



Hydrate Crystals Lab
Notes: We did make a prediction/hypothesis which you should include in your introduction and comment on again in your conclusion. We did not do a second heating. The pre-lab questions do not need to be answered but you may answer them in some fashion during your introduction (make sure the paragraph makes sense if including such information). We did not answer all analysis/post-lab questions. Only use the ones completed in class for your analysis and conclusion sections.



Hunting the Elements Q&A - CP Print Out by 11/21 (Period 3) and 11/25 (Period 7). CPST TBD

Flame Test Lab - Due November 24-26th, 2014


Rutherford Gold Foil Simulation Lab - Due November 11th, 2014




Identification of Unknown Materials
The identities of the 8 unknown items are in the list below with density in g/cm3.

Acrylic - 1.16 - 1.19
Aluminum - 2.70
Balsa - 0.11 - 0.20
Brass - 8.4
Bronze - 8.5
Cadmium - 8.69
Cobalt - 8.86
Copper - 8.90-8.96 (This is your known standard, if your density is not within that range, it means your measuring technique needs adjustment!)
Delrin - 1.41
Latex - 0.92-.96
Magnesium - 1.74
Nylon - 1.15
Oak - 0.60 - 0.97
Pine - 0.35 - 0.6
Polystyrene - 1.06
PVC - 1.39
Pyrex - 2.23
Rubber - 1.13-1.20
Scandium - 2.99
Steel - 7.7-8.1
Strontium - 2.64
Zinc - 7.14

Composition of the Penny Lab (Lab Report due October 3rd [P3 and P7 only])
In your conclusion section, the following should be answered within the paragraph - not as separate questions.
1) The composition of the penny changed significantly once (not counting the war-era steel pennies). According to your density data, when did this change occur and does it match up with history? *Does your research of this change support your data?*
2) What was the original percent composition of the Lincoln-style penny (1909) and what is the composition today?

The following questions are for groups who cannot determine the change based on density alone.
3) What information can you use to determine when the change occurred since density is inconclusive?
4) When did this change occur? *Does research of this change support this set of data?*

Templates by Class