Part of The Student Room Group

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

Investigate one factor affecting the rate of enzymatic decomposition of hydrogen peroxide by catalase.

Extracts from this document...

Introduction

The enzymatic Decomposition of Hydrogen peroxide Naoto OKAWA Aim: To investigate one factor affecting the rate of enzymatic decomposition of hydrogen peroxide by catalase. Hypothesis: Bigger the volume of the catalase, faster the rate of reaction Safety: Due to the hydrogen peroxide is corrosive we need the protection for example glasses and gloves Safety Precautions. Avoid any contact with hydrogen peroxide it will burn our skin. If any contact with hydrogen peroxide, wash the part where get contact painstakingly with water and report to teacher. Variables: Independent Variable - Volume of the potato Cut the potato into different sizes, dimensions of the potato pieces were equal Dependent Variable - Time taken Fill the test tube with a little bit of hydrogen peroxide. ...read more.

Middle

Carefully make the potato to pieces by using mold make 5 of it 3. Measure the dimensions of the potato pieces with the ruler 4. Measure 5ml of hydrogen peroxide with the measuring cylinder 5. Pour 5ml of hydrogen peroxide into the test tube 6. Release one piece of potato into the test tube 7. Start the stopwatch as soon as the potatoes get inside test tube 8. Stop the stopwatch when the oxygen bubbles reach the brim of the test tube 9. Record the time taken 10. Repeat the steps 4~9 for the remaining four pieces. Data Table - Volume (cm3) Time (sec) Rate (1/sec) 0.250 11.37 0.09 0.624 9.48 0.11 1.575 7.68 0.13 2.312 5.98 0.17 3.220 4.85 0.21 Conclusion: My hypothesis was right. ...read more.

Conclusion

I recorded the time taken with the stopwatch to two decimal places. I measured 5ml of hydrogen peroxide with 10ml measuring cylinder as soon as possible because they might react with something in the air and change. Also all the controlled variables were controlled. No anomalous results are shown in my graph and table. There are several stuffs that I can improve next time. One is, to increase the reliability of results, I could have put thermometer to measure the room temperature. This must be controlled to make it a fair experiment because reaction will easily get changes by dim temperature difference. Evaluation of results: The results of my experiment were precise. As the graph shows, no anomalous results were found. This indicates that the experiment was enough fair and went successful. Due to the topic of this experiment is biology the experiment, 'The Enzymatic Decomposition of Hydrogen Peroxide' falls on Health and Social Education in AOI. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Chemistry section.

Found what you're looking for?

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

or


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 International Baccalaureate Chemistry essays

  1. THE CATALYTIC DECOMPOSITION OF HYDROGEN PEROXIDE

    Thus an asymptote would be formed at that point. Expected Graph: Variables: Independent Variable: Mass of manganese (V) oxide used. Dependent Variable: The time taken for the hydrogen peroxide to decompose. Control: Volume of hydrogen peroxide used (10cm3) Concentration of hydrogen peroxide (3%)

  2. Investigate the rate of reaction of luminol in various factors. The objective was to ...

    5. Record the time taken for chemiluminescence. 6. Repeat the steps above for several times A1. Investigation: rate of reaction in different concentration of Hydrogen peroxide (using 0.15M H2O2) 1. Put 5cm3 of H2O2 to a test tube. 2. Add 5cm3 of luminol solution to the H2O2.

  1. Aim: Using an iodine clock reaction to find the order of hydrogen peroxide and ...

    Timer Error Somewhat Significant since the uncertainty of the time was carried forward to the rate, which gave a total uncertainty of 31% in the most extreme case. This is almost a 1/3, which means the time could have been 1/3 more or less, so the all experiments could have been more or less.

  2. Moles of Hydrogen report

    Length of Magnesium (cm) Volume of Magnesium (cm3) Moles of Magnesium(mol) 1.0 17.67 0.727 1.5 27.37 1.216 2.0 36.50 1.501 2.5 43.50 1.789 3.0 54.90 2.258 3.5 61.45 2.528 4.0 67.80 2.789 4.5 82.70 3.402 3. The volume you measured under the laboratory conditions must be changed.

  1. PRODUCTS OF A DECOMPOSITION REACTION

    (Theoretical - Experimental) / Theoretical a/b = ( 0.05 � 0.04g ) / ( 3.18 � 0.02 g ) 0.05 / 3.18 = 0.0157233 (measurement) ?0.02 � 0.01g Relative error of a = 0.04 / 0.05 = 0.8 Relative error of b = 0.02 / 3.18 = 0.006289308 Sum of

  2. Measuring the fatty acid percentage of the reused sunflower oil after numerous times of ...

    5.120 ± 0.019% = 0.9% ± 0.7% ml/g oleic acid Trial 3: V = 12.5 ± 0.1 ml → Vε = 12.5 ± 0.8% ml m = 5.096 ± 0.001 g → mε = 5.096 ± 0.020% g A% = (12.5 ± 0.8% x 0.0028 x 100)

  1. Reaction Rate

    Collect all necessary equipment from the equipment table- all equipment should be in one tray. 1. Setup the retort stand and clamp on a stable desk. The clamp should be fixed approximately half way up the stand. 1. Open up Photo Booth or a similar video/image-capturing program on a laptop

  2. Investigating Factors that Affect the Rate of Reaction of the Decomposition of Hydrogen ...

    rubber stopper with stem A test tube rack Procedure: Part 1 of the experiment: Decomposing 3 % of H2O2 solution with 0.5 Yeast at about 30°C Take the 1-liter beaker and add 700 mL of room temperature water. Take the tripod, place a matt/cover that is fire resistant on top

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