• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Finding the Empirical Formula for Magnesium Oxide

Extracts from this document...


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. 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 Investigation 2: Magnesium = 36.10 - 36.03 = 0.07g Oxygen = 36.14 - 36.10 = 0.04g Magnesium Ar = 24 Oxygen Ar = 16 To ensure that my final answer was as accurate as possible, I did not round any numbers until the end to get the most accurate final equation. Likewise for test 1, 3, and the average. Investigation 3: Magnesium = 36.10 - 36.03 = 0.07g Oxygen = 36.19 - 36.12 = 0.07g Magnesium Ar = 24 Oxygen Ar = 16 To ensure that my final answer was as accurate as possible, I did not round any decimals off until the end to maintain accuracy throughout the calculation. ...read more.


Oxygen is in the sixth group of the periodic table, and therefore has 6 electrons in it's outer shell, so needs to gain 2 electrons to achieve a full outer shell, as shown in the following diagram. So when the two of these elements react with each other, magnesium oxide is formed. In this, there are magnesium ions, which have a positive charge x 2, and negative oxide ions, (double negative charge). This shows that for each magnesium atom there is, one oxygen atom will react with it, as only one magnesium atom is needed to react with one oxygen atom for the outer shell of each to become full; two magnesium atoms are not necessary; the diagram clearly shows for each magnesium atom, one oxygen atom will react with it. The two electrons on the outer shell of the magnesium atom are transferred over to the gap of the outer shell of the oxygen atom, leaving both atoms with a full outer shell. Therefore, the formula for Magnesium Oxide is Mg O. ...read more.


To avoid this, the crucible with the magnesium oxide inside should have been reheated and then weighed again after the final weighing, until a constant mass could be found. It would be very difficult to perform this experiment accurately for tests 1, 2, and 3. Doing the experiment again, I would try and keep this part more accurate, but it is very difficult to maintain this level of accuracy. To further my experiment, perhaps I would experiment with different elements, e.g. use another element in group 2 of the periodic table with oxygen, to see if the formula would involve the same number of atoms, e.g. for Beryllium Oxide, I would expect the equation to be BeO, as magnesium and beryllium have a similar atom structure. I could also react magnesium with another element in group 6, such as sulphur. For this, I would expect the formula to be Mg S, because Sulphur has a similar atomic structure to oxygen, both holding 6 electrons in their outer orbital. Joanna Sedgwick 1 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Classifying Materials section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Classifying Materials essays

  1. Rate of reaction of hydrochloric acid on magnesium.

    The 0.5M graph is were the curve starts to develop but going further onto 0.6M there is more proof of the curve being formed. So therefore the last graph 0.7M of HCl displays an obvious curve shown at the tip of the best-fit line.

  2. Investigation to Identify the Formula of Hydrated Copper Sulphate and in doing so Find ...

    automate the experiment to leave as little human contact as possible from the experiment and so leave a smaller margin of error.

  1. Free essay

    Periodic table

    speed up reactions Not changed by reaction Same amount of catalysts left at the end as there was in the start Catalysts help by making bonds break more easily - reactants use less energy - therefore reaction is faster Catalysts can be recovered and used again Biological catalysts found in

  2. The role of mass customization and postponement in global logistics

    Further downstream in the supply chain come the deferred assembly and deferred packaging options, both of which take place at theatre warehouses serving regions of the world or specific countries. Deferred assembly means that it is the final configuration of the product itself which happens at theatre warehouses rather than at production plants.

  1. Find out the theoretical yield of Magnesium Oxide, find the percentage yield of Magnesium ...

    Because 24 is the relative atomic mass of Magnesium. So 2 Moles of Magnesium = 48g 2 Moles of MgO = 48 + 32 = 80g of MgO Because the relative atomic mass of oxygen is 32 and I added that to the relative atomic mass of Magnesium. 48g of Magnesium makes 80g of Magnesium Oxide.

  2. Relationship between mass of MgO and its formula

    His theory basically shows that the atoms of different elements could be distinguished by differences in their weights. Here is his theory in short: - All matter is composed of atoms - Atoms cannot be made or destroyed - All atoms of the same element are identical - Different elements

  1. Finding the empirical formula of aluminium chloride.

    The diagram below illustrates the structure, where an arrow denotes a dative covalent bond pointing from donor to acceptor: Hence the molecular formula for the anhydrous aluminium chloride is Al2Cl6 , which written in its empirical form is AlCl3. Method and Materials: Outline and Reactions: The experiment involves several stages.

  2. Finding the Empirical formula for Magnesium-Oxide.

    The magnesium would need to be reacted with oxygen, to do this most efficiently, the magnesium should be heated in oxygen, but not excess oxygen because the magnesium would burn in excess oxygen.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work