Determining the Empirical Formula of Magnesium Oxide

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Chemistry Lab Report example:

Chemistry Laboratory Report (Magnesium Oxide)

INTRODUCTION:

As we learned before on how to determine the empirical formula of a compound based on the test and also chemical analysis on it. Hence this experiment is mainly goes around with how to determine the empirical formula of Magnesium Oxide following various tight procedures in order to get the knowledge and apply it onto another compounds. We are investigating the empirical formula of Magnesium Oxide in this experiment.

RESEARCH QUESTION:

How empirical formula of Magnesium Oxide is obtained by heating Magnesium in the presence of air?

HYPOTHESIS:

When Magnesium and Oxygen are heated together, they readily undergo a chemical change

Magnesium + Oxygen = Magnesium Oxide

From the combination of chemical properties between Magnesium and Oxygen, we can absolutely calculate the empirical formula Magnesium Oxide, we measure the mass of the Magnesium initially and the mass of Magnesium Oxide yet we can just find the difference between Magnesium Oxide and Magnesium to get the ‘mass’ of the Oxygen. This method seems more beneficial rather that measuring the mass of Oxygen initially.

If Magnesium is being heated in open air, it has very obvious and rapid reaction as the metal meet fire and burns with an intense white flame with the white smoke as a product. Thus we can slow down the process by limiting the supply of oxygen that reaches the Magnesium by placing a lid on the crucible.

VARIABLES:

Dependant: Mass of Magnesium Oxide(g)

Controlled:

No
Variables
Units
Possible effect on result
Method of controlling
1)
Mass of Magnesium ribbon
Grams(g)
The amount of mass either less/more will affect the accuracy of the result obtained
Use the same mass of Magnesium ribbon in each repeated trials which is 0.3 g
2)
Time interval to open the lid
Seconds(s)
The time interval to open the ld either less/more will affect the accuracy of the result obtained
Use the same time interval top open

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