DRAFT: This module has unpublished changes.



Parameter Trial 1
Mass of Crucible and Lid (g) 38.102 g
Mass of Crucible, lid and magnesium (g) 38.284 g
Mass of magnesium (g) 0.176 g
Mass of curcible, lid and magnesium oxide (g) 38.370 g
Mass of magnesium oxide (g) 0.268 g
Amount of magnesium in the compound (mol) 0.00723 mol
Mass of oxygen in the compound (g) 0.092 g
Amount of oxygen in the compound (mol) 0.0058 mol
Simplest qhole number ratio of oxygen to magnesium 1:1
Experimental empirical formula of the compound Mg1.3O1:0
Suggested empirical formula using whole numbers MgO



1. Finding the amount of magnesium in the compound




2. Finding the amount of oxygen in the compound



3.  MgXOy





Ratio 1.3:1.0


5. Simplest whole number ratio

  Mg1.3O1.0 = MgO


6. Error Calculation



Analysis and Conclusion:


   The purpose of this lab was to find the emipirical formula for the compound magnesium oxide. This was done by determining the mass of each element, caculating the number of moles in each element and finding the molar ratio of each element in the smallest whole number. The accepted empirical formula for magnesium oxide is MgO.  It has a ratio of 1 Mg: 1 O. The ratio that was received after completing the experiement was 1.3 Mg: 1.0 O. When written as the empirical formula it becomesMg1.3O1.0. When the experiemental empirical formula is rounded to the simplest whole number, it becomes MgO. This supports the hypothesis that the ratio would be 1 Mg: 1 O. Some errors in the experiment could have come from some of sample being left on the paperclip or some of the metal could have not reacted in the reaction which could lead to inaccurate results. To improve the experiment, the experimenter should make sure that all of the sample is used and none of it is lost to get the most accurate result possible.


DRAFT: This module has unpublished changes.