Wednesday, October 9, 2019

Potato Osmosis Lab

You took data with a group, but I would like to write this up individually.  That means that each of you should design your own data table, organize your own graph, etc.   

Your Lab Should Include:

  1. A focused question
  2. A neat organized data table for your raw data and your processed data results. You should include measurement uncertainty, but don't need to propagate uncertainty for averages (because it wouldn't really make sense in this case).  Include 2-3 observations of the potatoes.
  3.  Sample calculation:  Show a sample calculation for percent change.  Make sure that you include a blank equation, the equation with numbers inserted, and the correct rounded answer with units.
  4. A graph!  This can be hand done or with a computer.  See the DBQ on p. 42 for help, but of course your graph should have an appropriate title, labels, units, annotation, etc.  You do not need to put on error bars this time because you will not be propagating error for the percent change calculation.
  5. Conclusion/Interpretation of results:  Refer back to your question.  Use specific data to back yourself up.  Try to EXPLAIN your results using osmosis concepts.  Finally, were you able to determine the salinity of the potato?  Explain why or why not.
  6. Evaluation:  Evaluate your results by discussing at least 3 sources of uncertainty, their impact on the results, and your suggested improvements (this can be done in a table as we did before)
I would like your lab to be turned in through turnitin.com, but if you have calculations and/or a graph that you want to do by hand, just make a note of that in your lab and then turn the hard copies of calculations/graph in my box with your name on it.

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