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SMHS PHYSICS (MCCOY) Formal Laboratory Report Format

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Lab Reports Typewritten reports documenting your experimental results. Be sure to clearly label each section! Use complete sentences. Double space your report. Title Page Objective Introduction Procedure Data Results and Calculations Discussion Conclusion Questions

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Title Page This will identify the experiment, you, the course, your class, your instructor, and the date(s) the experiment was performed. Very important so I can keep track of what you are handing in! Exploring Gases: The Determination of the Ideal Gas Constant, Molar Volume and Percent Potassium Chlorate in a Mixture Jane Smith Lab Partner: (if appropriate) Chemistry 120 Section 5399 Instructor: D. Vance September 3, 2007 completed September 17, 2007 turned in

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Objective Why are you doing this experiment? Objective: To experimentally find the ideal gas law constant, R, calculate the percent error in the experimental ideal gas law constant, the molar volume, its percent error, and the percentage…

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Introduction This section tells a little bit about the theory of the experiment and how it will be done. Be sure to label your reactions (i.e. rxn 1…) and your formulas/equations ( i.e. eq 1…) so that it is easier to refer to them in the text. Introduction: In this experiment experimental values for the ideal gas law constant, R, and the molar volume of a gas, V m, will be found. Oxygen gas will be formed by the decomposition of potassium chlorate: MnO 2 2 KClO 3 (s) 3 O 2 (g) + 2 KCl (s) rxn 1 heat The oxygen gas will be…

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Procedure Reference the procedure used and note any deviations from the published procedure. Safety and Waste treatment should be noted here too. Procedure Write a detailed description of how you completed the experiment.

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Data Insert all data from the experiment. Do not analyze or manipulate the data – this section is merely to publish exactly what you found without coming to any conclusions.

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Results and Calculations Tabulate data (you may copy and paste the spreadsheet) and any calculated values. Be sure to show sample calculations. (These may be hand written.) For non-numerical labs, summarize the data generated. Weight of empty test tube assemblyxxx.xx g Weight of test tube assembly and KClO 3 /O 2 xx.xx g Weight of test tube assembly and residueg Weight of O 2 liberatedg Volume of H 2 O displacedL Etc... Sample Calculation xxx.xxg-xx.xxg=xx.xxg Etc… Results and Calculations Table 1: Decomposition of KClO 3 Data

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Discussion This is where you get to explain your results and talk about any errors that may have occurred. Discussion: The value of the ideal gas law constant was found be to 61.2 L torr mol -1 K -1, that is a percent error of 1.9%. This value is very close to the actual value of 62.4 L torr mol -1 K -1. One possible source of error could be that the volume of water in the florence flask and the beaker was not equalized before the…

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Conclusion This is where you give the final result. This is essentially the punch line-- Conclusion The ideal gas law constant was found to be 61.2 L torr mol -1 K -1 with a percent error of 1.9%, the molar volume was found to be 25.3 L mol -1 with a percent error of 12.8%, and the percent…

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Questions Answer any questions posed in the lab here.

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