Monday: Design lab time! Last day to collect all your data. Grades as follows: Due next Monday, Nov 9th.
|Experimental Methods||Math||Data Collection and Presentation|
|Shows thorough understanding of method, thorough explanation of a detailed plan (procedures, including calculations) as we as thorough evaluation of results.||Demonstrates thorough ability to apply mathematical process and can justify their use (this time, use gas laws). (clearly labeled calculations w/ any assumptions stated, inc. Just and application of s.f. Rules)||Thorough measurement technique, presents data clearly and correctly.|
|Less thorough, but competent||Demonstrates ability to apply mathematical routines and can sometimes justify their use.||Less thorough. (s.f., labeling)|
|Lacks justification||Demonstrates ability to apply mathematical processes to solving chemistry problems.||Poor technique. (miss. Est. dig, +/-)|
|Discussion or plan is weak or missing too much.||Demonstrates some ability to apply mathematical processes to solving chemistry problems||Missing essential information|
|No Evidence||No Evidence||No Evidence|
So for Methods/Error Analysis make sure you:
- Show work/ justify with words as you go along like you did on mixtures lab
- Justify number of sig figs in final molar mass.
- Calculate percent error.
- Sample 1 was Na
- Sample 2 and 3 were K
- Say what you are doing (steps),
- why you are doing it that way (rationale for choices – use KMT principles),
- how you will get an answer (calculation), including plan for certain sig figs
- Error Analysis/Conclusion
- Did you get good R values? Was one gas better than the other? Are they similar? Why should they be similar?
- Limitations of method/equipment/conclusions,
- discussion of variability (precision…number of decimal places since you don’t have multiple trials) and accuracy (percent error) of the data that is justified
- State the error
- Determine whether it was random or systematic and justify this
- What effect did the error have on the results – in detail. Do math if necessary. Do not just say it would throw off the result. Give an example.
Tuesday: No school, teacher professional day (also voting day)
Thursday: Simulation on Rxn Rates. HW: Work on lab
Friday: Boltzmann notes and worksheet + catalyst demos, potential energy diagrams and explanations of Temp and Ea using Boltzmann. HW: effusion/diffusion reading and questions and catalytic converter article.