• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
  17. 17
  18. 18
  19. 19
  20. 20
  21. 21
  22. 22
  23. 23

F336-hydrogen peroxide individual investiation

Extracts from this document...


Contents Section Page Planning 3-5 Method 5-7 Risk Assessment 7-9 Results and Evaluation 9-21 references 22-23 An investigation to show the effects of Manganese (IV) Oxide catalyst (MnO2) and Catalase on the decomposition of Hydrogen Peroxide (H2O2) Planning Using two catalysts at two different temperatures, Manganese (IV) Oxide and Catalase, I can then determine which is the most effective catalyst by examining the different activation enthalpies Hydrogen peroxide is made by quite a few enzymes in the body. Hydrogen Peroxide is a poisonous by-product of metabolism, this can kill cells. In particular, some enzymes breaking down certain amino acids and fatty acids (D-amino acid oxidase and acyl-CoA oxidase) make significant amounts of hydrogen peroxide. Since hydrogen peroxide can be damaging to normal tissue, these enzymes are kept inside specialized organelles inside cells called peroxisomes. The peroxisomes also contain large amounts of catalase to breakdown the hydrogen peroxide before it can escape. 1 Catalase is also found in food such as potato and liver. Catalase breaks down the Hydrogen Peroxide molecule because the shape of the molecule matches the active site of the catalase enzyme. The equation below is the breaking down of Hydrogen Peroxide into water and Oxygen. 2H2O2 (aq) --> 2H2O (l) + O2 (g) Hydrogen Peroxide is also broken down by inorganic catalysts such as Manganese (IV) ...read more.


Hydrogen peroxide is also a strong bleach. Contact with my clothes and skin, can change the colour of my clothes or skin. Therefore I should wear a lab coat and a pair of gloves. The symptoms and the steps to take if poisoned by hydrogen peroxide, if hydrogen peroxide were to come in contact with your eyes. You should wash it with cold water and seek immediate medical attention. To prevent this, I should wear plastic goggles. If hydrogen peroxide is swallowed, the victim should get a burning sensation in their mouth and throat, they should drink plenty of water, should not be made to vomit, and seek immediate medical attention. Care should also be taken when removing the cap on a hydrogen peroxide bottle, because of build up of gas pressure. Manganese (IV) Oxide Principal Hazards- harmful if you swallow or inhaled Safe Handling- wear safety goggles, and work in well ventilated area Emergency- Eye Contact- Immediately flush the eye with water, and keep washing with water for several minutes. If irritation persists, call for medical help. Skin Contact- wash off with soap and water If swallowed- wash out the mouth, and seek medical help It is dangerous if it comes in contact with aluminium and other metal powders. ...read more.


Percentage error= (0.05/12) x 100 = 0.42% * 8cm3 with an error of (+/- 0.05%) Percentage error= (0.05/8) x 100 = 0.63% I will then measure out 1 Gram of Manganese(IV) oxide on a balance (2dp) * 1 gram with an error of 0.005% Percentage error= (0.005/1) x 100 = 0.5% The stopwatch I was using could also contain a vital error. Firstly it could contain factory defect meaning it could be a few second out which could affect my results especially for the initial rate. The stop watch only gave values to a certain degree of accuracy therefore has an error of +/-0.01s. My first reading was at 24 seconds so: Percentage error = (0.01/24) x 100 = 0.04% Equipment Error Significance The Burette, different concentrations of H2O2 20% H2O2 + 80% H20 1.56% Due to it having a large error and used for making the hydrogen peroxide solution then it is possible that it altered the overall concentration of the reaction 30% H2O2 + 70% H2O 1.19% 40% H2O2 + 60% H2O 1.05 50% H2O2 + 50% H2O 1% 60% H2O2 + 40% H2O 1.05% The Balance 0.5% Small error likely to have insignificant significance The stopwatch 0.04% Small error and was not stopped during the reaction so error is likely to be insignificant. Cumulative Error: 6. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Organic Chemistry 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 AS and A Level Organic Chemistry essays

  1. Marked by a teacher

    Experiment to Determine Acidities of Wine. The purpose of this experiment is to ...

    5 star(s)

    Volatile Acidity Australian Volume of NaOH added (cm3 ) pH 0 3.2 2 3.4 4 3.6 6 3.8 8 4.1 10 4.4 12 4.6 14 5.1 15 5.3 16 5.7 17 6.3 18 7 18.5 7.2 19 7.6 19.5 8 19.6 8.1 19.7 8.2 19.8 8.3 19.9 8.4 20 8.5

  2. F336- aspirin individual Investigation

    The answer... Phenol. A German chemist Hermann Kolbe heated sodium phenoxide under pressure with CO2 and the reaction mixture was then acidified to yield salicylic acid. This is known as Kolbe synthesis So now chemist could make aspirin without the need of the willow tree and make it in much larger quantities.

  1. The aim of this experiment is to produce Aspirin. This is an estrification in ...

    Safety precautions (9) Operation Hazard Risks Control measures 95% ethanol and phenolphthalein indicator solution (contains ethanol) Ethanol Highly flammable Breathing the vapour has a narcotic effect. Risk of fire. Wear eye protection. Wear protective gloves. Avoid skin contact 0.1M sodium hydroxide solution solid Corrosive Solid causes severe burns and is particularly dangerous to eyes.

  2. The aim of this experiment is to obtain the rate equation for the reaction ...

    Comparing experiments a and g, when the [H+] was tripled, the rate of reaction was also around tripled. The rate of reaction was directly proportional to the concentration of H+(aq). Therefore, we can conclude that the reaction was in first order with respect to H+.

  1. investigating the amount of ascorbic acid present in fruit

    Doing this will enable me to get my average titre. Orange: 36.30 + 36.30 + 36.40 = 109 = 36.33cm3 3 3 My three best titres (for the orange sample)

  2. Comprehensive and Detailed Chemistry notes

    concentrations of common ions > total of dissolved solids > hardness > turbidity > acidity > dissolved oxygen and biochemical oxygen demand * construct word and balanced formulae equations of chemical reactions as they are encountered There are three important steps involved: 1- Show all reactants and all products in the word equation.

  1. Chemistry Investigation - How does chain length affect: ∆Hcè for alcohols?

    Ethan-1-ol 1 spirit burner (varying volume) Butan-1-ol 1 spirit burner (varying volume) Heptan-1-ol 1 spirit burner (varying volume) Octan-1-ol 1 spirit burner (varying volume) Water 5 x 100ml METHOD: PROCEDURE: * The aforementioned apparatus should be arranged in a suitable arrangement, as shown in Appendix A.

  2. Compare the enthalpy changes of combustion of different alcohols

    When the apparatus is set up according to the diagram, the testing can begin. The calorimeter consists of a copper can, I will use this instead of a bomb calorimeter which would ensure the alcohol is burned under standardised conditions.

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