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

Finding the Number of Moles of Magnesium and Oxygen in Magnesium Oxide

Extracts from this document...


IGCSE Practical Assessment Finding the Number of Moles of Magnesium and Oxygen in Magnesium Oxide Aim The aim of this experiment is to burn a known mass of magnesium in air and to find the mass of the magnesium oxide produced. Using the results, you can then calculate the number of moles of magnesium and the number of moles in magnesium oxide. Apparatus - Crucible & lid - 10 cm length of magnesium ribbon - Sandpaper - Tripod - Pipe clay triangle - Bunsen burner - Tongs. Method 1. Before the experiment, find the total mass of the crucible and the lid. 2. Clean a 10cm length of magnesium ribbon using sandpaper, then coil the magnesium ribbon and place it inside the crucible. ...read more.


Remember to note any changes occurring during the reaction and the appearance of the contents of the crucible at the end of the experiment. 5. Let the crucible cool down, then find the total mass of the contents, crucible, and the lid. 6. Use the results to calculate the number of moles of magnesium and oxygen in magnesium oxide. Results Mass measured before the experiment Crucible and lid: 53.08g Crucible, lid & magnesium: 53.17g Magnesium: 53.17g- 53.08g = 53.09g Appearance of magnesium Before experiment: Shiny grey/ silver, ductile/ malleable During experiment (in order): Turns bright orange, releases white smoke, magnesium glows, turns into powder, powder becomes white. After the experiment: white, powdery, brittle, still in shape of coiled magnesium. ...read more.


Different issues can affect the results. E.g. the amount of oxygen reacting with the magnesium can be affected by the number of times you lift the lid during the reaction; the amount of time the reaction takes to complete can be affected by the strength of the Bunsen flame. Also, the magnesium ribbon we used might not be pure magnesium and therefore the magnesium oxide we made from the experiment may contain other materials, which will affect the accuracy of the mass of magnesium and oxygen. To improve the quality of the experiment, it's important to use pure magnesium to make sure that the substance we make only contains the two materials we need, which is oxygen and magnesium. You should also let in reasonable amount of air into the crucible during the experiment to complete the reaction that will provide possibly the most accurate results. ...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 graphs 0.3M and 0.4M there is a direct proportional change between the hydrogen released and the rate of reaction. Between 0 to 90seconds the reaction was constant. I think this illustrates that the concentration of HCl was too low and the proportion of its particles was dominated by the

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

    There are no hard and fast rules. The right postponement model will vary company, by product group, by market. The planning, inventory optimization and decision support systems help companies set the right postponement levels and targets, and make accurate service and delivery commitments.

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

    Mass of magnesium oxide (4 - 1) 0.06 Calculations: 1. Calculate the theoretical yield of Magnesium oxide in this redox reaction. Theoretical Yield of MgO. 2Mg + O2 --> 2MgO Weight of 2Mg = 24 x 2 = 48(g) Because 24 is the relative atomic mass of Magnesium.

  2. Relationship between mass of MgO and its formula

    Mg O Mass 0.2g 0.11 RAM 24 16 Moles= mass RAM 0.2= 0.00833 24 0.11= 0.006875 16 0.008333=1.21 0.006875 0.006875=1 0.006875 Ratio 1.21:1 12.5cm Mg O Mass 0.28g 0.13 RAM 24 16 Moles= mass RAM 0.28= 0.01166 24 0.13= 0.008125 16 0.01166=1.435897...

  1. Combining Magnesium and Oxygen

    To convert H2O from grams to moles you divide by the molar mass. To find the molar mass of H2O, add the mass of hydrogen multiplied by two (1.0079 x 2) plus the mass of oxygen (15.9994). Then divide this total into the amount of grams.

  2. GCSE Chemistry - Obtaining Zinc Oxide from Calamine

    mass Of zinc oxide obtained mass of calamine. Fair Testing: I weighed the boiling tube and calamine as precisely as possible at each stage of the experiment. I will make sure to use a new boiling tube for each mass of calamine that I heat to ensure nothing could be

  1. Percentage composition by mass of magnesium oxide

    The lab burner was places under the crucible, lighted and heated with a gentle flame. 6. Gradually, the flame intensity increased until all the magnesium turned into a white powder. 7. The flow of gas was cut off and the crucible, lid and contents, were allowed to cool down.

  2. factors affecting the errosion of a magnesium statue

    The smaller the pieces of solid, the quicker the reaction. The greater the surface area of the reactants, the more particles available for a successful collision. Low surface area High surface area The rate of a reaction is also determined by the concentration of the reactants.

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