Description
please read the attachments before writing the report.
Read the intro 1,2 &3 that we followed for lab experiment to know the tools we used and the chemicals and the steps.
Report sheet are attached which include all the data that we collected for this lab report is attached from my note book. (use the data in the note sheet)
Report Style:
1-Cover Page (50 points)
2-Introduction (50 points) (should include what is the lab about, how the report will cover the experiment. General information about the topic) full page
3- Typed data and observations (400 points) (should include all the data attached as report sheet with further information like what you think of the reaction and how we got these numbers. Also, pictures while doing the experiment will be attached,)
4-Conclusion (500points) (explanation of the experiment and what you learn from this experiment and what you think) (explosions of how you thing the data are, and explain what error occurred in the experiment)
(There will be more pictures to attached during the experiment)
(There will be a plagiarism check)
Mass of magnesium Mass of Mg= 40.195 g Number of moles of magnesium Number of moles of oxygen
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Explanation & Answer

Attached.
CHEM 110L-002
General Engineering Chemistry I
Fall, 2019
(DETERMINATION OF EMPIRICAL FORMULA FOR MAGNESIUM OXIDE)
Date: 10/9/2019
Introduction
According to Dalton’s Law of Multiple Proportions, elements combine in specific whole numbered ratios to
form specific compounds. Chemical formulas can be written as a smallest whole number ratio of combined
atoms. When written in this form, the chemical formula is known as an Empirical Formula. Empirical means
“experimentally determined” in this case. Empirical formula is often different from the molecular formula.
Empirical formula is the simplest whole number ratio of elements that combine to form a compound, while
molecular formula represents the specific proportions present in a compound. For example, the Empirical
formula for benzene is CH, while the molecular formula is C6H6. (www.socratic.org, n.d.) More than one
molecular formula can exist for the same Empirical Formula. Both benzene (molecular formula C6H6 ) and
acetylene (molecular formula C2H2) have the empirical formula CH. Any unknown sample which shows an
elemental analysis with Empirical Formula CH could possibly be acetylene, benzene, or any other molecule that
contains only C and H and contains them in a 1:1 ratio. (Chemcollective.org, n.d.)
The purpose of this experiment was to experimentally determine the Empirical Formula for an oxide of
magnesium (MgOx). Magnesium metal burned in air combines with the oxygen in the air with a primary
product of magnesium oxide.
2 Mg (s) + 1 O2 (g) → 2 MgO (s)
A side product is also produced by combination of magnesium and nitrogen in the air. This side product is
magnesium nitride.
3 Mg (s) + 1 N2 (g) → 1 Mg3N2 (s)
2
Addition of drops of distilled water converts the magnesium nitride to magnesium hydroxide. Magnesium
hydroxide is converted by further heating to magnesium oxide by loss of water.
1 Mg(OH)2 (s) → 1 MgO (s) + 1 H2O
The mass of magnesium is subtracted from the final weight of magnesium oxide after heating to yield the
mass of oxygen consumed. By using the molecular weights of magnesium and oxygen, moles of magnesium
and moles of oxygen are calculated. The ratio of these moles is the experimentally-determined ratio of
magnesium to oxygen in the product, MgOx.. This ratio, rounded off and expressed as whole numbers, provides
the experimentally-determined Empirical formula for magnesium oxide, MgOx.
In this lab report, the purpose, background, and chemical reactions have been covered in the Introduction.
The materials used in the experiment are covered in the Materials section. The stepwise procedure is covered in
great detail in the Procedure Section. In the Data and Observations sections, photos of the actual experiment in
progress are presented with descriptions. A photo of the Raw Data recorded in the Student Laboratory
Notebook is provided. These Raw Data are then used in the Calculations section to show how mass of
magnesium, mass of magnesium oxide, and mass of oxygen are calculated. By use of atomic weights, detailed
calculations are shown for determining moles of Mg and O. Calculation of a mole ratio for Mg : O is then
shown and explanation is ma...
