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# Molar Mass of Oxygen

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Introduction

Molar Mass of Oxygen Topic: GAS Assessment: DC, DPP, CE Name: Nicholas Sudharta Partner (s): Bryan Ap Date of Experiment: Data Collection________________________________________________________ Mass of Test Tube= 31.32 g Volume of [10% solution] = 5 mL Mass of [10% solution] = 5 g (at r.t.p conversion) *r.t.p conversion, at 25�C and 1 a.t.m, convert 1.00 g/mL Displaced Volume of Water Trial 1 Trial 2 Water 0.052 L 0.050 L Data Processing________________________________________________________ Average values: Worked Example for Water: Average Trial Value Water 0.051 L Assumptions: Pressure () = 1 atm. Temperature () = 25� C= 298.15 K ________ Gas Constant () = 0.082057 Chemical Reaction: Decomposition of Hydrogen Peroxide Ratio of mol between Hydrogen Peroxide and Water Ideal Gas Formula Calculate mol of Water produced [using Ideal Gas ...read more.

Middle

The majority of the failure is from the volume result. From Avogrado's law we know that. As such, because the average volume (0.051 L) was low, the mol resulting from it is also low. A small mol results in a large Mr value, or in our case the Mr of Oxygen is too high. -Another point to that is that if the experiment was assuming r.t.p, our results prove to be incorrect again. If we compared the mol, the actual mol results of andusing the ideal gas laws is different than if we calculated using normal Stoichiometry. From Stoichiometry, the actual mol of is, and if we compared it to a ratio of 2:2, the actual mol value of is also 0.138 mol. ...read more.

Conclusion

OR the second conclusion is that our group did not wait long enough and thus lost some potential volume results. -To evaluate, the major flaw to the experiment was the value of the data collected. Part of the reason was because we used Vaseline as a tool to reduce the amount of energy (in the form of the Oxygen gas) to the surroundings. Vaseline is a good measure to do so, however a better alternative is probably to increase the number of trials, to have a more close system that may significantly reduce the uncertainties, and to maybe reduce the length of rubber tube (by reducing the length of rubber tube the amount of water left is reduced). ...read more.

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