Magnesium and MgO

760 WordsFeb 18, 20183 Pages
Conclusions For the first trial, after .398 grams of magnesium were mixed with .251 grams of oxygen, the result yielded .649 grams of magnesium oxide. In the second trial, after .404 grams of magnesium were mixed with .132 grams of oxygen, the result yielded .536 grams of magnesium oxide. In the third trial, after .406 grams of magnesium were mixed with .702 grams of oxygen, the result yielded 1.108 grams of magnesium oxide. All three of the trials yielded different results in the data table; but, there were only two different empirical formulas, percent compositions and mole ratios for each of the trials. For the first trial, the empirical formula was MgO and the percent composition for magnesium was 60.31% and the percent composition for oxygen was 39.69%. For the second trial, the empirical formula was Mg2O and the percent composition for magnesium was 75.24% and the percent composition for oxygen was 25%. For the last trial, the empirical formula was MgO but that was after the simplification of the original empirical formula, Mg2O2, and the percent composition for magnesium was 60.31% and the percent composition for oxygen was 39.69%. In conclusion, when heat and oxygen were applied to the magnesium, the common empirical formula that was derived from magnesium and oxide was MgO. Discussion of Theory The purpose of this lab was to find the percent composition and empirical formula of magnesium oxide. The empirical formula was proven to be MgO and the percent
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