chemistry 2
track61
Last Revised 9/5/2012
CHE1200L Abstract How to write the abstract
Students will receive a grade on each lab report based on a scale of 25 points. 5 points represents the advanced study, 5 points represent the data, 5 points represent the conclusion questions and 10 points represent the abstract. Completeness and correctness both count towards the grade. The following categories will be included in each grade:
1. Advanced study assignment.
2. Data entry- the data is clearly and completely entered, in ink, at the time when collected. All quantitative data is recorded, not just calculated results.
Example: Mass of beaker with salt 53.6710 g Mass of empty beaker 52.1110 g
Mass of salt 1.5600 g
Qualitative data is clearly labeled and reported in a complete and meaningful manner.
3. Calculations- the calculations clearly show the procedure and formulas used, and report a correct answer with the proper significant figures and units.
4. Results- each lab has a final result, either a correct numerical value for an unknown variable, a graphical or mathematical relationship between variables, identification of unknown substance, or specific qualitative relationship.
5. Conclusion questions (if any).
6. Conclusions- Conclusions will be in the form of an abstract summarizing the experiment. Conclusions will be typed (word processed) and one to two pages long. The abstract should follow the rules of technical writing including capitalization, spelling and grammar. Any calculated results should be clearly expressed. Any sources of error should be mentioned in this section. Your conclusion should be based on your data, not what you think the answer should be. The conclusion may be best written by using the mnemonic RERUN:
Recall- summarize what you did in the experiment
Explain- explain the scientific principle addressed by the experiment, what results you expected (if testing a known relationship).
Results- what results did you get.
Uncertainty- what are your sources of error. Quantitative results should have the uncertainty expressed quantitatively.
New things learned- what important new concepts were shown by the experiment. Link the experiment to major class concepts.