Determination of the Formula of a Metal Oxide

Determination of the Formula of a Metal Oxide - MgO...

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Determination of the Formula of a Metal Oxide Jenine Hajjar Ashley Glennon
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October 14, 2007 Professor Lloyd Chem 110 Sect. C Purpose The objective was to prepare metal oxide and determine its empirical formula. We also verified the law of constant composition. Procedure Refer to pages 19-21 in laboratory notebook for the Determination of the Formula of a Metal Oxide lab. There was one change to the procedure. In step 7 of the procedure we cut up the strip of magnesium to increase the surface area and increase the amount of oxygen taken in. Calculations
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Summary of Results % Magnesium in Magnesium Oxide 63.3 % % Oxygen in Magnesium Oxide 37.7 % Mole Ratio of MgO 1:1 Empirical Formula of Magnesium Oxide
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Unformatted text preview: MgO Conclusion The purpose of this lab was to have the student determine the empirical formula of magnesium oxide and to demonstrate the law of constant composition. The student also practiced finding a constant weight. The results of the experiments were finding that Magnesium Oxide is 63.3% and 37.7% Oxygen. Also we found the mole ratio to be 1:1, therefore making the empirical formula of Magnesium Oxide, MgO. Possible sources of error could be touching the outside of the crucible, therefore getting your oils on it and affecting the final results. Also, not waiting for everything to cool completely could affect the masses. No data was discarded....
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