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

The effect of catalase on hydrogen peroxide

Extracts from this document...

Introduction

The effect of catalase on hydrogen peroxide. Introduction What is the role of enzymes in a chemical reaction and what kind of the given substance contains more catalase than others? Materials * Raw potato * Boiled potato * Juice * Liver * Yeast * 5 tests tube * Match * Stick Results Items in test tube with hydrogen peroxide in them Order from fastest reacting to the slowest reacting yeast Reaction was fast, there was more bubble and the test tube became warm. Gas was formed and on testing it with a lit stick, it glows brighter. ...read more.

Middle

Stick doesn't glow Boiled potato No reaction and no bubbles formed. Stick doesn't glow. Conclusion Fresh living materials have enough catalase present in them. When exposed to hydrogen peroxide bubbles of gas are produce. The gas which was formed in the first three items was oxygen as when it was exposed to a glowing wooden stick it glows brighter. In the yeast and liver test tube more bubbles were formed vigorously because when yeast and liver is added to hydrogen solution, a decomposition reaction occurs, liberating oxygen gas as shown in the reaction below. ...read more.

Conclusion

This was due to absence of catalase in the juice and boiled potato. When the potato was boiled the catalase was denatured that's why it was missing in the potato. Evaluation It was hard to measure the 2cm3 of the H2O2 into the test tube since the measuring cylinder which was given was just calibrated 5 cm3 and 10 cm3. Due to that, a method of estimation was used which might have caused some errors. To develop this experiment I like to used the measuring cylinder which has the actual number to the required measured told. . ?? ?? ?? ?? ...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

    Start the stopwatch once all the hydrogen peroxide has come into contact with the manganese (V) oxide. 3. Stop the stopwatch when the reaction ceases to produce any more effervescence 4. Wash out the conical flask with distilled water and dry with a cloth.

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

    When graphed, five experiments were sufficient enough to notice that there was a clear trend line for each of the experiment sets, and so further experiments did not need to be carried out.

  1. DCP+CE Analysis of a Hydrogen Peroxide Solution

    � (1.8x10-7mol x 6) = 0.0141 � 1.08x10-6mol = 0.0141 � 6x10-5% (0.0141 � 6x10-5%) / 6 = (0.0141 / 6) � (6x10-5%+0) = 0.0024 � 6x10-5% = 0.0024mols � 1.44x10-8mols Uncertainty for calculating the average amount of KMnO4 in 2nd titration Adding absolute and dividing absolute uncertainty 20.6�0.15ml + 20.8�0.15ml + 20.6�0.15ml = (20.6 + 20.8 + 20.6)

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

    However, this equation would not apply when the size of potato get massive. The line in the graph will eventually reach to a plateau. This is when the volume of potato reaches at some amount or more than hydrogen peroxide, the rate of reaction would not increase any further due to the saturation of the enzyme-substrate complex.

  1. Decomposition of Hydrogen Peroxide Lab

    Determining Rate Orders at Table of Volumes and Concentrations Part Volume Molarity Volume Molarity Initial Rate (kPa/s) 1 4.00 0.88 M 1.0 0.5 M 0.1356 2 4.00 0.88 M 1.0 0.25 M 0.06263 3 4.00 0.44 M 1.0 0.5M 0.07641 3)

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

    H2O2 and using a 10 mL pipette transfer 4 mL of H2O2 from a container into the 10 mL graduated cylinder. Take a 10 mL test tube and add fill 4 mL of H2O2 from the 10 mL graduated cylinder into the 10 mL test tube.

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