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

Find out the theoretical yield of Magnesium Oxide, find the percentage yield of Magnesium Oxide identify any possible errors in the practical.

Extracts from this document...

Introduction

The Preparation of Magnesium Oxide. Aim: The aim of this coursework is to find out the theoretical yield of Magnesium Oxide, find the percentage yield of Magnesium Oxide identify any possible errors in the practical. Apparatus/ Equipment list: * 1 Crucible with lid. * 10cm Strip of Magnesium strip. * Emery cloth. * Bunsen Burner * Tripod. * Tight Spiral * Heat Proof Mat Risk Assessment: When doing this experiment you must be careful not to hurt yourself. As you can see, the equipment above doesn't seem all that dangerous so not much precaution must be taken when doing this experiment. * Wear Gloves: - You must always wear gloves when doing experiments, but For this experiment its not really necessary so you can wear it Depending on your own choice. * Wear Lab- Coat: - You must always wear a lab coat from the very beginning Of the experiment and this is really necessary, in not Wearing a lab coat you could most probably spill something Onto yourself and this could be highly dangerous. * Wear Safety Goggles: - You must also wear safety goggles at all times they help Help in protecting the eyes from anything in reach with It that is hazardous or dangerous in any form or way. ...read more.

Middle

this will give you the mass of the magnesium strip roughly. * Then roll up the magnesium strip and put it into the crucible and then cover it with the lid making sure that there are no small gaps for oxygen to enter the crucible. * Heat the crucible over the Bunsen burner for a maximum of ten minutes and every two minutes remove the Bunsen burner from underneath the crucible and lift the lid a slight bit to let in a fraction of air inside the crucible. * Turn off the Bunsen burner and then allow the crucible to cool for at least fifth teen minutes, when its cooled down record the mass of the crucible + lid + magnesium oxide and then find out the mass of the magnesium oxide (mass of magnesium oxide + lid + crucible) - (mass of crucible + lid). Then write down the results in the table. * Finally clean away all the apparatus and return them to where they belong. Mass (g) 1. Mass of Crucible + lid (empty) 21.47 2. Mass of Crucible + lid + magnesium ribbon 21.52 3. Mass of magnesium Ribbon (2 - 1) 0.05 4. Mass of Crucible + lid + magnesium oxide 21.53 5. Mass of magnesium oxide (4 - 1) ...read more.

Conclusion

Can you identify any possible errors in this practical? * I can firstly identify that there may have been a problem when cleaning the magnesium strips, they may not of been cleaned with the sand paper good enough so this might have caused an miscalculation of some sort in the experiment. * The magnesium strips may have been overheated and the experiment should've had an approximate time for the magnesium to be heated. * When weighing the crucible, magnesium strip etc, I noticed that the results on the weighing scale kept on changing. I weighed the crucible and lid and the results on the weighing scale kept on switching from 21.47 to 21.49 so I just decided to go with 21.47g * The tight spiral wasn't much of a good support for the crucible and the crucible kept on tilting at odd angles because of this, which causes the lid to lift off a-bit and a-bit of the magnesium oxide ashes blew into the air. 4. Can you make any recommendations of how the yield for this reaction could be improved? The yield for the reaction could have been improved probably if you was to use a longer length of magnesium strip or maybe if you was to heat the magnesium strip longer or shorter period of time. ...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. Percentage composition by mass of magnesium oxide

    Using the stirring rod, the contents of the crucible were crushed into a powder. 10mL of distilled water was added to the powder.

  2. Rate of reaction of hydrochloric acid on magnesium.

    So I had chosen to monitor the amount of the gas produced every 15 seconds. I had calculated the average by the three trials that I had investigated on. I have decided to approach this experiment another way when I do my actual rate of reaction experiment.

  1. Free essay

    Periodic table

    - A = Adenine - T = Thymine - C = Cytosine - G = Guanine NB: A is always attracted to T and C is always attracted to G - this forms the rungs of the double helix model.

  2. Burning of magnesium metal

    They make a dull sound Now I am going to carry out 1 test. I am going to burn magnesium in air to form magnesium oxide. Description before Magnesium is an element which is a shiny metal as well. It's solid and feels heavy for their size.

  1. Chemistry Coursework. Aim: To find out if the thickness of plastic bags is ...

    Use the same method for the remaining three strips from each plastic bag. Range: I will test seven different Plastic bags, all ranging in thickness and mass, from 0.01mm thick, up to 0.08mm thick. The masses will range from 0.1g, up to 0.46g.

  2. Our experiment consisted of two samples of water containing unknown substances, and our objective ...

    If our results were quantitative, we could've found out the average and take that as our final answer. Of course, with the equipment that was available in class it would've been impossible to achieve quantitative results for stage 2. If we could do the anion testing again, I would do

  1. Gold. For thousands of years, gold has been regarded as the finest and ...

    GOLD ALLOYS If it weren't for alloys, gold wouldn't be used as jewellery as it would be too heavy to be worn every day. Alloys are two or more metals chemically bonded, which share properties of its different metals. This is a bit like selective breeding, where plants or animals

  2. factors affecting the errosion of a magnesium statue

    The time and concentration is inversely proportional and have a negative correlation. The concentration and rate of reaction is directly proportional and have a positive correlation. These are the two graphs I will plot. A catalyst is a substance that speeds up a reaction without being used up itself.

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