M6L1 Determination of Ideal Gas Law Constant 2022

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SUNY Empire State College *

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1206

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Chemistry

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Jun 4, 2024

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docx

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4

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Determination of Ideal Gas Law Constant April 6, 2021 Purpose To understand the relationship between pressure and the number of moles of gas in order to determine the ideal gas law constant. Procedure Comprise an apparatus to calculate the gas particles when hydrogen peroxide and yeast are mixed. Experimental Data Table 1 Include correct units with each data Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 Trial 6 Trial 7 Trial 8 Air temperature 22.2 C 22.2 C 22.2 C 22.2 C 22.2 C 22.2 C 22.2 C 22.2 C Volume H 2 O 2 1ml 1ml 2ml 2ml 3ml 3ml 4ml 4ml
1 Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 Trial 6 Trial 7 Trial 8 liquid Initial Volume Gas 2ml 5ml 6ml 7ml 7ml 6ml 4ml 7ml Final Volume Gas 9ml 11ml 20ml 19ml 50ml 30ml 40ml 40ml ΔV 7ml 6ml 14ml 12ml 43ml 24ml 36ml 34ml Table 2 Show reaction used to produce O 2 Include correct units with each data Concentration H 2 O 2 Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 Trial 6 Trial 7 Trial 8 Moles H 2 O 2 2mol 2mol 4mol 4mol 6mol 6mol 8mol 8mol Moles O 2 1mol 1mol 2mol 2mol 3mol 3mol 4mol 4mol ΔV (L) 0.007 L 0.006 L 0.015 L 0.012 L 0.025 L 0.025 L 0.035 L 0.033 L Show calculations: © 2016 Carolina Biological Supply Company
2 Concentration of H 2 O 2 3g/34.01g/mol/0.1=0.882mol Moles H 2 O 2 .882x.001=0.000882mol Moles O 2 Insert graph of moles of O 2 vs. volume of O 2 . Label graph correctly. Add linear trendline. Table 3 Include correct units with each data Result Calculations Air Temperature 295.2K Air Pressure 1.0atm Equation of Line from the graph Y=18.25x Gas Constant R .882x.001=0.000882 mol M=RT/P Percent Error 24.8% 0.08206- 0.0617/0.08206X100=24.8% © 2016 Carolina Biological Supply Company
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3 Lab Questions 1. Would the volume of oxygen generated in the reaction change if a smaller mass of yeast were used? Why or why not? The volume of oxygen generated would not change if a smaller mass of yeast were used. This is because the yeast is a catalyst and a catalyst does not affect the reaction or the product. 2. Which assumptions did you make in this experiment? That the more product there was, the more gas particles there would be 3. Identify at least two potential sources of experimental error. User error when measuring the yeast and or hydrogen peroxide. Another would be measuring the gas incorrectly. Experimental Conclusions This experiment helped me understand the relationship between pressure and the number of moles of gas to determine the ideal gas law constant Personal Reflection This was a cool lab. A bit messy due to the water but overall it was a cool lab © 2016 Carolina Biological Supply Company