Percentage Composition of Magnesium Oxide

Paper Summary:

The paper offers a hypothesis on the percentage composition by mass of magnesium oxide and outlines the materials and procedure used in the experiment to test the hypothesis as well as the observations found. The paper then lists the calculations that determined the percent composition by mass of magnesium oxide is 35% oxygen and 65% magnesium. The paper includes a discussion on the results obtained.

Outline:
Purpose
Hypothesis
Introduction
Materials
Procedure
Observations
Calculations
Conclusion
Discussion

From the Paper:

"The percentage composition is essentially how much of one element is contained within a single compound. The law of definite proportions states that a specific compound will always have the same elements within it by definite proportions of mass [ref 1]. If this law is determined to be true, then that would mean that the percentage composition of any given substance should be the same throughout multiple samples. The magnesium strip of metal is polished with steel wool to remove any contaminants that are on the strip. The contaminants on the strip of metal could come from the natural state of the air, the container they were in, or anything that has come in contact with the magnesium. When magnesium is combusted (burned) it produces a white-powdery substance that is also known as magnesium oxide."

Sample of Sources Used:

• Jenkins, Dr. F, et. al., Chemistry 11, Nelson, Toronto, 2002, p. 125-126.

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