• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  5. 5
    5
  6. 6
    6
  7. 7
    7
  8. 8
    8
  9. 9
    9
  10. 10
    10
  11. 11
    11
  12. 12
    12
  13. 13
    13

I shall be investigating what affects the decomposition of Hydrogen Peroxide. I will accomplish this by setting up an experiment with a hypothesis, diagrams and a complete write up.

Extracts from this document...

Introduction

I shall be investigating what affects the decomposition of Hydrogen Peroxide. I will accomplish this by setting up an experiment with a hypothesis, diagrams and a complete write up. Hydrogen Peroxide is a colourless, viscous and unstable liquid with strong oxidising properties. It is a chemical compound of Hydrogen and Oxygen with the chemical formula H202. Pure, anhydrous Hydrogen Peroxide is a colourless, syrupy liquid with a relative density of 1.44. It blisters the skin and has a metallic taste. The liquid solidifies at -0.41�C (31.4�F). Concentrated solutions are unstable, and the pure liquid may explode violently if heated to a temperature above 100�C (302.4�F). It is soluble in water. To slow the decomposition of the peroxide into water and oxygen, organic substances such as acetanilide are added to the solutions, and they are kept in dark bottles at a low temperature. Hydrogen Peroxide is manufactured in large amounts by the electrolysis of aqueous solutions of sulphuric acid or of potassium bisulphate or ammonium bisulphate. In this investigation I am exploring what affects the decomposition of Hydrogen Peroxide and the variables are what affect the reaction. There are five types of variables, these are: - 1) Categorical - these variables are things such as colour and shape of object used to carry out experiment. As I am investigating what affects the decomposition of Hydrogen Peroxide, this type of variable does not alter the investigation, as it shall be kept as a constant. ...read more.

Middle

The main risk, which scientists carrying out this experiment would experience, is the corrosiveness and harmfulness of the Hydrogen Peroxide. It blisters the skin and can be poisonous. This hazard can be overcome by handling the compound with care, wearing protection i.e. gloves and eye protection e.g. goggles. Another risk is the hazard glass can pose when not handled and used correctly. The gas syringe can pop out causing a danger to the scientist conducting the experiment. This minor hazard can be overcome by handling all glassware with care and full attention. Due to the experiment only taking a short duration of time to complete, most variables are ineffective. Categorical, Continuous and discrete variables will all be at a constant throughout the practical ensuring a fair test. The Independent and Dependant variables shall be calculated, controlled and recorded by the scientists performing the experiment, this shall also ensure a fair test. To ensure fair testing measuring cylinders and spatulas are used to make sure that the exact same amount of each substance is used for each experiment. Whether it be just one scientist conducting the experiment, or three, the same set of eyes and actions shall carry out the same job in each experiment to ensure fair testing. Conclusion * From my research I have discovered the formula: - Rate of Reaction = volume of oxygen given off Time taken to complete Experiment This formula enables me to calculate the rate of reaction for each concentration: - 20% = 377.5 � 240 = 1.57 cm�/s 16% = 200 � ...read more.

Conclusion

The abnormal amount of Oxygen given off was due to the freshness of the Hydrogen Peroxide as it had just been made up by one of the laboratory technicians at school, therefore making it more reactive as it had not had anytime to decompose itself in anyway. I will modify and expand the original experiment in a number of ways. Firstly I must decide what I'm going to investigate. I am going to investigate how temperature affects the decomposition of Hydrogen Peroxide. Method to investigate how temperature affects the decomposition of Hydrogen Peroxide: - 1. Pour 10ml Hydrogen Peroxide into a test tube. 2. Place the test tube into a water bath at a certain temperature and begin the stopwatch. 3. After 3 minutes in the water bath, withdraw the test tube and re-measure the Hydrogen Peroxide left. Record the amount left in the test tube. 4. Carry out the experiment for temperature ranging from 10�C to 90�C. Don't range the temperatures near the boiling and freezing points of water (100�C and 0�C), as the state of the Hydrogen Peroxide will affect the rate of reaction. 5. After recording the set of results, place them onto a table and graph from analysis and observation. Enabling an investigation into how temperature affects the decomposition of Hydrogen Peroxide. * Encarta Encyclopaedia 1998 Version CD - ROM. * Britannia Encyclopaedia 2002 Version CD - ROM. * Multimedia Science Software * SEC Science Books * CGC Chemistry GCSE Revision Book. Coursework Factors Affecting The Decomposition September / October Of Hydrogen Peroxide 2002 Chemistry 1 David Clark Mr Edwards room 20 ...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 Patterns of Behaviour 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 Patterns of Behaviour essays

  1. Factors Affecting the Rate of Catalytic Decomposition of Hydrogen Peroxide.

    This would make analysis of the results very difficult. Atmospheric pressure is unsuitable for a school laboratory experiment. It requires expensive, specialist equipment which is unavailable. Mass of catalyst is unsuitable as it requires extensive knowledge about catalysts and their effects, and it has still not been openly decided what the effect of mass of catalyst is.

  2. Investigation of the effect of the concentration of hydrogen peroxide on the rate of ...

    and then a larger one to add the liquids together and pour. The reason for this is that the two smaller cylinders were very hard to pour simultaneously into the conical flask, so they were both poured into one cylinder for easier pouring.

  1. The Effect of Catalase in the Breakdown of Hydrogen Peroxide

    make the reaction very fast, therefore, it would be difficult too record the data. Nevertheless, I still want to reaction high concentrations of catalase to determine their rate of reaction. Though the experiment, to me, was fair and safe, I also think there could been aspects of the experiment that could of caused anomalies.

  2. Free essay

    Close Your Eyes

    of the morning when we'd eventually fall asleep on the sofa or living room floor. She was such a laugh and we were such close friends. I just wish we could be a little more. *Danny* The night was going perfect.

  1. Decomposition of Hydrogen Peroxide Investigation.

    It then must be rinsed several times. Water must be added to the solution to dilute it at least times before washing the liquid down the foul drain. The absorbent may go into refuse. Results Table Catalyst Distance froth measured up the test tube (mm)

  2. Rate of Reaction Investigations - Decomposition of Hydrogen Peroxide.

    conical flask, same measurement of hydrogen peroxide and manganese (iv) oxide etc. I'll be following the method accurately and measuring the volume of oxygen every 30seconds. Concentration 0.2M Time Volume oxygen produced (cm3) Average (s) 1st 2nd 3rd (cm3) 0 0 0 0 0 30 16 13* 15 16 1:00

  1. Magnesium Oxide

    mass which also means that we would get the wrong result for a particular length. Why we had to lift the lid was so that we could check if the reaction stopped and to let oxygen in so that the reaction could continue well.

  2. Investigation of a Factor Affecting the Rate of Hydrogen Peroxide Decomposition

    7. Measure out 0.1 grams of catalyst (manganese oxide) on the watch glass with the electronic balance. 8. Add the catalyst to the conical flask, put the stopper in the top tightly and have another person start timing when the catalyst is added.

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