Rough Grading Rubrics for
Formal Report: Avogadro’s Law
Typed formal report: 30 points
1. Title: 2 points
Name, Partner’s name, title and date of experiment, lab section should be included. Deduct 0.5 pt for each missing.
State the problem: What is the problem this experiment and/or study try to solve? (1 pts) A short paragraph or a few sentences leading to the background information.
Background: define important terms and how they are used to solve the problem proposed (3 pts)
Assume you were in an age when Avogadro’s Law was just proposed. Discuss the importance of Avogadro’s Law and how to use it and other gas laws (Boyle’s Law and Charles’ Law) to derive Ideal Gas Law. Students may also use other relevant concepts.
Ends with a statement of purpose: what does the student want to achieve through this experiment and how to achieve it? (1 pts)
A short paragraph of purposes. Students should provide some insights, not in great details though, the methodology used to achieve these purposes.
Students should summarize narratively their revised procedure here. No bullet point or numbered steps. No point value is assigned. But deduct 3 pts if this section is missing and deduct 1 point if this section is not written in appropriate format.
4. Data & Calculations: 6 points
Proper data table(s) to summarize all data and calculated result (4 pts)
Proper data table should be included for all data and their calculated result. All table(s) should be labeled with proper table number and title. Be aware that students may use a different table and may include different amount of data in their table. However, all the major data and calculated result should be included in the table.
Introduction to data table(s) (2 pts)
All data tables should be introduced and major data should be described in words how they were achieved. Equations may be used in this section to aid this purpose.
5. Results & Discussion: 10 points
This is the meat (or bread and butter ) of the formal report!
Result statements: 4 pts
Student should briefly summarize their results on both (1) Verification of Avogadro’s Law; and (2) Calculated gas constant R, including the percent error of R. 2 point for each part.
Error analysis: 6 pts
Students should briefly assess the results, especially how linear the excel graph is and how high (or low) the % error of R is. Then students should identify at least three reasons or sources of errors to account for the difference between their result to literature value of R. These errors may focus on different part of the lab or all of them. Students should also discuss how these errors may have affected the experimental R value and how they might have been avoided or minimized. 2 pts for each reasonable error and corresponding discussion.
6. Conclusion: 4 points
Restatement of purpose, summarize calculated results, significance of experiment. 1 to 2 short paragraphs are expected.
7. References: 1 points
Student should include the lab manual and textbook from which they get definitions of major concepts. Sources of the literature values for Gas Constant R and vapor pressure of water should be included as well. Students may have other references if they used other resources to help them propose procedure or help them interpret data and write formal report.
8. Overall Style of formal report: 2 points
3rd person, past tense, formatting, complete sentences, being typed, well written, etc.