Determining the Empirical Formula of Magnesium Oxide Essay

Determining the Empirical Formula of Magnesium Oxide Essay

Length: 717 words (2 double-spaced pages)

Rating: Good Essays

Open Document

Essay Preview

Determining the Empirical Formula of Magnesium Oxide

INTRODUCTION:

The empirical formula is the simplest and lowest whole number ratio of
the different atoms in a sample of compound. To work out the empirical
formula, the value of moles of the different atoms in a compound is
needed. Mole is just simply a unit used to measure the amount of
atoms, just like how the unit "dozen" is used to measure things such
as eggs. One mole is 6×10^23 atoms and this number is called the
Avogadro number. The mole can be also defined as the number of atoms
in exactly 12g of Carbon.

In this experiment, the magnesium will be heated and this magnesium
will react with the oxygen in the air to form magnesium Oxide.

DIAGRAM:

METHOD:

1. An empty crucible and its lid were weighed on an electrical
balance. The mass of the crucible and its lid were recorded.

2. The surface of the magnesium ribbon was scraped with emery paper to
remove any magnesium oxide on the surface.

3. The magnesium was coiled and placed in the crucible. Then the lid
was replaced on the crucible, and the mass of the crucible with lid
containing the magnesium was found. The mass was recorded.

4. The safety goggle was worn. Then apparatus was setup as shown in
the diagram. The magnesium was first heated with a small blue flame
and after a several minutes with a roaring flame.

5. Every few minutes, the lid of the crucible was lifted carefully
with a tong to see if the magnesium had started to burn and also to
left some air enter the crucible to make the experiment more
efficient.

6. When the magnesium had completely reacted, the crucible was heated
stron...


... middle of paper ...


...al possible source of error is that some white
fume magnesium oxide escaped from the crucible. This error can be
prevented by performing the experiment in a fume cupboard. The most
significant source of error is that some magnesium possibly reacted
with Nitrogen in the air to form Magnesium Nitride. Since 78% of air
is made up of Nitrogen, it is highly possible that some Magnesium
reacted with the Nitrogen. This made the mass of oxygen that reacted
with the magnesium low, which made the mole of magnesium higher than
the accepted value. This error can be prevented by burning the
magnesium in pure oxygen, not air; although, this is very difficult to
do in reality. One way the experiment can be improved is to perform
the experiment several times and record the average result so that a
more accurate result can be obtained.

Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

Empirical Formula of Magnesium Oxide Essay

- 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....   [tags: essays research papers]

Free Essays
583 words (1.7 pages)

Determining the Empirical Formula of Magnesium Oxide Essay

- Determining the Empirical Formula of Magnesium Oxide INTRODUCTION: The empirical formula is the simplest and lowest whole number ratio of the different atoms in a sample of compound. To work out the empirical formula, the value of moles of the different atoms in a compound is needed. Mole is just simply a unit used to measure the amount of atoms, just like how the unit "dozen" is used to measure things such as eggs. One mole is 6×10^23 atoms and this number is called the Avogadro number....   [tags: Papers]

Good Essays
717 words (2 pages)

Finding the Empirical Formula for Magnesium Oxide Essay

- Finding the Empirical Formula for Magnesium Oxide The Results In order to work out the ratio for magnesium and oxygen, I will have to calculate the amount of magnesium and oxygen used. [IMAGE] From these results, and knowing that the Ar for Magnesium is 24, and the Ar for Oxygen is 16, I can find the number of moles for Magnesium and Oxygen. Investigation 1: Magnesium = 36.08 - 36.04 = 0.04g Oxygen = 36.11 - 36.08 = 0.03g Magnesium Ar = 24 Oxygen Ar = 16 -------------------------------- [IMAGE] Investigation 2: Magnesium = 36.10 - 36.03 = 0.07g Oxygen = 36.14 - 36.10 = 0.04g Magnesium Ar = 24 Oxygen Ar = 16 -------...   [tags: Papers]

Free Essays
925 words (2.6 pages)

Using Hess’s Law to Calculate Heat of Formation of of Magnesium Oxide Essay

- Heats of Reaction and Hess’s Law Lab Background: Thermochemistry is the branch of chemistry that deals with the amounts of heat evolved or absorbed during chemical reactions. When the pressure is constant, the amount of heat gained or lost in a chemical or physical change is the enthalpy change for the process, or heat of reaction. Heat of reaction can be calculated by using Hess’s Law which states that the heat released or absorbed in a chemical process is the same whether the process takes place in one or in several steps, also known the law of constant heat summation....   [tags: reaction, calorimeter, experiment]

Good Essays
1061 words (3 pages)

Evaluating The Electrode Performance Of Metal Oxide Essay

- An effective way to optimize the electrode performance of metal oxide was developed by employing exfoliated 2D RuO2 nanosheet as a conducting additive. The exfoliated RuO2 nanosheet was easily incorporated into the Li−MnO2 nanocomposite via a simple mixing of exfoliated RuO2 and MnO2 nanosheets, followed by the restacking with Li+ ions. The incorporation of RuO2 nanosheet was found to be quite effective in increasing the surface area of the restacked Li−MnO2 nanocomposite. The obtained heterolayered Li−MnO2−RuO2 nanocomposites delivered much greater specific capacitances than those of the pristine Li−MnO2 and Li−RuO2 nanocomposites....   [tags: Oxide, Oxygen]

Good Essays
1316 words (3.8 pages)

Infant Formula: Good, Bad or Innocuous Essay

- ... By the 1920's, parents were advised to add orange juice to their baby's formula to decrease the risk of scurvy. The 1950’s found over half of all infants being fed formula. During the late 1950s and early 1960s, most of the prepared infant formulas fell into one of two classes. There were formulas similar to home-prepared evaporated milk formulas but with added vitamins and formulas that were lower in protein and contained vegetable and oleo oils with added vitamins and minerals. The lower protein formulas gradually took over in popularity due to the unpleasant smell of regurgitated butterfat and the idea that the formulas similar to home-made evaporated milk formulas caused constipation...   [tags: mother's milk versus baby formula]

Good Essays
1685 words (4.8 pages)

Origins of Magnesium Essay

- ORIGINS OF MAGNESIUM Magnesium is found in large amounts throughout our bodies. We obtain it predominantly from dietary sources. We can also obtain magnesium in many other places since it is the seventh most prevalent element from our universe. The earth’s crust contains large amounts of this element and we can obtain it from the minerals dolomite and carnallite. It is, however, most commonly extracted from our ocean waters. “Every cubic kilometer of seawater contains about 1.3 billion kilograms of magnesium”1 (Education)....   [tags: dietary, crust, water, salt, requirements]

Good Essays
1113 words (3.2 pages)

Breast Feeding vs Formula Essay

- Breast-feeding is nutritionally, emotionally and physically superior for a mother and her child. “Human breast milk is not standard nor is it interchangeable with cow’s milk. It is a dynamic fluid that changes in composition to meet the needs of the baby as it grows” (“Giving your Baby... Diet.” par. #10). Breast milk contains growth factors and antibodies which stimulate the growing baby and protect it from illness such as diarrhea, ear infections, rashes, allergies, asthma, skin problems, pneumonia, respiratory illness and other serious illnesses....   [tags: Comparing Breast Feeding and Formula ]

Good Essays
1353 words (3.9 pages)

Essay on The Magnesium Statue

- The Magnesium Statue Planning The Problem A statue, which is made of an alloy consisting mainly of magnesium, corrodes at different rates, at different times of the year. Background Knowledge ==================== There are some areas of knowledge that should be taken into consideration to help in devising an experiment to help determine the cause of the problem, and which gave me a greater understanding of the problem. A major factor in the decay of the statue is acid rain, which prevents the formation of the oxide coat that would normally form on magnesium preventing corrosion in air....   [tags: Papers]

Free Essays
1967 words (5.6 pages)

Magnesium Essay

- Magnesium is the twelfth element on the periodic table. It is located in the second group called the alkaline earth metals. Natural magnesium contains three different isotopes, and there are twelve others that are recognized. Seawater is a rich source of magnesium in the form of salt. Magnesium is the eighth most abundant element in the earth's crust. Magnesium readily ignites upon heating in air and burns with a dazzling white flame. To extinguish the flame water should not be used. Alkaline earth metal salts in general, are less soluble in water than the corresponding alkali metal salts....   [tags: essays research papers]

Good Essays
1299 words (3.7 pages)