   # Finding the Formula of Magnesium Oxide

Good Essays
Finding the formula of magnesium oxide
Aims
When magnesium is heated in air, it reacts with oxygen. During this oxidation reaction, magnesium oxide is produced. This increases the mass. If we know the mass of magnesium at the start, and the mass of magnesium oxide produced at the end, we can work out the mass of oxygen which has been combined with the magnesium. We can use these masses to work out the formula of magnesium oxide.

Eye protection must be worn

Apparatus
Crucible and lid
Tongs
10cm length of magnesium ribbon
Small piece of sandpaper
Digital balance

Goggles
Bench mat
Tripod
Bunsen burner
Pipe-clay triangle
Methods
1.

Weigh the empty crucible with its lid, and write down the result in a table.

2.

Clean the piece of magnesium ribbon with sandpaper, then coil it loosely around a pencil.
Put the magnesium ribbon into the crucible and put the lid on.
Weigh the crucible, lid, and magnesium together, and write down the result in your table.

3.

Put the crucible onto the pipe-clay triangle. Leave the lid slightly ajar to to allow air into the crucible. Heat gently for a minute, then strongly. Continue heating until the reaction has finished
(the magnesium will glow at first, then look a bit like a furry grey-black caterpillar – it really will!)

4.

Turn the Bunsen burner off, and allow the crucible to cool for a few minutes.
Reweigh the crucible with its lid and contents, and write down the result in your table.

Results (suggested table only – do not write on this sheet) crucible Objects crucible + lid crucible + lid + magnesium crucible + lid + contents after reaction

Mass (g)

pipe-clay triangle tripod
HEAT

Conclusions
1.

Work out the mass of magnesium used in the experiment.
Apparatus to oxidise magnesium

2.

Work out the mass of magnesium oxide formed.

3.

Use your answers to (1) and (2) to work out the mass of oxygen gained.

4.

Look up Ar(Mg) and Ar(O). Use these

## You May Also Find These Documents Helpful

• Good Essays

Working out the Formula of Magnesium oxide Aims When magnesium is heated in air, it reacts with oxygen. During this oxidation reaction, magnesium oxide is produced. This increases the mass. If we know the mass of magnesium at the start, and the mass of magnesium oxide produced at the end, we can work out the mass of oxygen which has been combined with the magnesium. We can use these masses to work out the formula of magnesium oxide. Apparatus Googles…

• 610 Words
• 3 Pages
Good Essays
• Good Essays

Empirical Formula of Magnesium Oxide Date: Aim: The aim of this experiment was to determine the empirical formula of magnesium oxide. Equipment: · Balance · Crucible and lid · Bunsen burner · Magnesium ribbon (0.2g) · Steel wool · Crucible tongs · Pipe clay triangle · Tripod Procedure: 1. Obtain a clean, dry crucible and lid, then heat them for approximately 5 minutes over a Bunsen burner 2. Clean the surface of a 20 cm strip of magnesium ribbon using steel wool 3. Coil…

• 621 Words
• 3 Pages
Good Essays
• Satisfactory Essays

DETERMINATION OF EMPIRICAL FORMULA OF MAGNESIUM OXIDE Objective: The objective of this lab is to experimentally determine the empirical formula of Magnesium Oxide. Equipment: • Ring Stand • 5 inch ring • wire gauze • Crucible and Crucible lid • Butane burner • Magnesium • Crucible tongs • Safety glasses • Gloves Experimental Procedure 1. Setup ring stand with five inch ring and triangle. 2. Obtain desired amount of Magnesium, a crucible with a lid…

• 437 Words
• 2 Pages
Satisfactory Essays
• Good Essays

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:…

• 1520 Words
• 7 Pages
Good Essays
• Powerful Essays

Chemistry Practical Report: Topic: Determining the Empirical Formula of Magnesium Oxide Patrick Doan 11 CHEM 11 26/9/08 Table of contents 1.0 Aim 1 2.0 Theory 2-3 3.0 Materials 4 4.0 Method 4 5.0 Results 4 - 5.1 Qualitative Observations 4 - 5.2 Example Calculations for each Calculated Value 5-7 -5.21 Experimental Values and Associated Errors 5-7 - 5.3 Accumulated Raw Data 8 - 5.4 Mean Experimental…

• 1976 Words
• 8 Pages
Powerful Essays
• Good Essays

31 Introduction- Magnesium is a silvery-white alkaline metal found represent by the atomic number of 12. This experiment involves combining Magnesium with Oxygen which is a gas represented by the chemical element 8. The word equation for the result of this experiment is Magnesium + Oxygen= Magnesium Oxide. The equation is Mg + O =MgO Definitions Word Definitions Mass Number The Mass number is the amount of Protons and Neutrons in the Nucleus. Atomic Number The amount of protons found…

• 936 Words
• 5 Pages
Good Essays
• Good Essays

The purpose of this lab was to find the empirical formula for magnesium oxide. To find this formula, a strip of Magnesium ribbon was burned in a crucible over a flame from a bunson burner. After the strip caught fire multiple times with the cover on, and 10 drops of distilled water were added, and the crucible was lightly heated. The crucible was then weighed and the mass recorded. Calculations were performed and the mole ratio of Mg to O was recorded. The results of other lab groups performing…

• 408 Words
• 2 Pages
Good Essays
• Good Essays

Aim: to perform a firsthand investigation to compare the physical and chemical properties of magnesium and oxygen when they are experimented to form magnesium oxide Theory: The empirical formula of a compound is the formula that tells us the ratio in which the atoms are present in the compound. To calculate an empirical formula: - Write down the masses of all of the elements present - Convert masses to moles (by dividing by atomic weights in grams) - Divide through by the smallest number of…

• 631 Words
• 3 Pages
Good Essays
• Good Essays

Determination of the Formula of Magnesium Oxide. Introduction: Magnesium is a mental, it is known to react with oxygen. Magnesium reacts vigorously when heated in the presence of air, which is why we have chosen high heat in our method to facilitate combustion. This oxidation reaction produces magnesium oxide gaining oxygen from the air. When sharing of electrons occur a chemical bond is made and the atoms combine to form a molecule. So, the predicted molecular formula: Mg + O2--------->…

• 653 Words
• 4 Pages
Good Essays
• Good Essays

Empirical Formula of Magnesium Oxide, students set out to find if there is a true 1:1 ratio in the empirical formula of MgO. This was determined by burning the Magnesium until a white smoke started to protrude. This showed the reaction of Oxygen combining with Magnesium to form Magnesium Oxide. This was then measured again and turned out to be slightly heavier than the measurement before. This added weight is Oxygen, forming the combustion of Magnesium Oxide. The formula for Magnesium Oxide is 〖〖Mg〗_1…

• 689 Words
• 4 Pages
Good Essays