exp_9_rubric

exp_9_rubric - Reasonable explanations for discrepancies...

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105B Spring 2008 Experiment #9 Overall goal: To measure galvanic cell potentials. Subgoals: 9 An introduction to the use of the digital voltmeter 9 Construction of a rudimentary salt bridge 9 Understand deviations of measured cell potentials compared to calculated cell potentials Scoring the lab report Boilerplate – ( 0-1) points Example of a one pointer Title Purpose – one sentence Procedure – no more than three sentences “Use the highest level of vocabulary!” Data Table – “Think Excel not Word” Results - Conclusion- “Did I do what I said I was going to do in the Purpose?” Example of a zero pointer Title Purpose Procedure one or more elements missing Data Table Results – Conclusion Results of Experiment #9 (0-3 points) Reasonable values for the sign and the magnitude of the measured cell potentials. (2 points)
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Unformatted text preview: Reasonable explanations for discrepancies between measured and calculated cell potentials. (1 points) Pre/Post Lab Questions as assigned by your TA (0-2 points) Lab Tips Experiments #9 Keep the alligator clips dry. Keep the alligator clips dry. Keep the alligator clips dry. Keep the alligator clips dry. For each measurement, record ANODE CATHODE VOLTAGE All measured galvanic cell potentials are positive. The iron wire electrode has an enamel coating and ~1/4 inch must be scraped off at each end. Looking good in Physics 101 The negative lead of the voltmeter (marked –COM or ± ) should be connected to the anode of the cell so that only positive voltages are displayed. Use a battery to practice taking voltage measurements so that you can recognize the anode and the cathode for the common cell types....
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This note was uploaded on 08/21/2008 for the course CHEM 105BL taught by Professor Warshel during the Spring '07 term at USC.

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exp_9_rubric - Reasonable explanations for discrepancies...

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