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

Find out if the surface area of a potato effects how many oxygen bubbles are produced when the potato is covered in Hydrogen Peroxide.Apparatus & Diagram

Extracts from this document...

Introduction

Aim To find out if the surface area of a potato effects how many oxygen bubbles are produced when the potato is covered in Hydrogen Peroxide. Apparatus & Diagram Delivery tube Measuring cylinder Boss & Clamp Boiling tube Stand Beaker Apparatus Test tube Stopwatch Ruler Beaker Measuring cylinder Safety goggles Scalpel Plastic tile Potato Hydrogen Peroxide Variable to Alter The variable I will alter in my experiment, is the surface area of the potato. This is because; by doing this I will answer my aim and also supply myself with the evidence needed to find out if the potato suface area effects the amount of oxygen produced by the enzyme. The amount of peroxide covering the potato. Different surface areas will need different amounts of peroxide covering them. The room temperature will also alter because I shall do the experiments over a certain number of days. ...read more.

Middle

I shall also place test tubes in a test tube rack carefully so that they do not break because they are easily broken. Method First of all I shall take safety precautions and wear goggles and tuck my tie in. Then I shall set the apparatus up shown in the diagram below. Measuring cylinder Clamp Boiling tube with Beaker peroxide and a potato I shall choose a healthy looking potato so that the experiment shall work properly. Then I shall get a little bottle of hydrogen peroxide. I shall cut a potato into the different cubic measurements listed below and place each potato into hydrogen peroxide for 3 minutes. I have chosen 3 minutes because I feel this is a sensible time from by knowledge from doing my preliminary that 5 minutes is too long and too time consuming. I will do the experiment with 4 different surface areas each 3 times because I feel this is a sensible amount of time to get accurate results. ...read more.

Conclusion

The activation energy should stay at the amount it is changed to by the biological enzymes. The surface area in this reaction should not change the activation energy, however, because no energy is being added in this experiment. Explanation Enzyme Substrate This has an active site. Enzyme Substrate The substrate no longer fits the active site. Preliminary Work I did a brief experiment in order to receive a more knowledgeable view over the final task. The changes that had to be enforced were that the experiment was done in 3 minutes instead of 5 minutes because 5 minutes was too time consuming and also 3 minutes would work just as well. The usefulness of the preliminary work was that I got the idea of using instruments like a measuring cylinder for example, with more accuracy by measuring below the meniscus. The main advantage of the preliminary experiment, was that in my method I stated that one should use a 100ml measuring cylinder for the retrieval of oxygen, but this test proved that 200ml beaker worked better for the experiment. ...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 Life Processes & Cells 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 Life Processes & Cells essays

  1. Marked by a teacher

    Investigating the effects of surface area on the rate of enzyme reactions.

    4 star(s)

    Conclusion The fastest rate of reaction was gained when the largest surface area of potato was used. The reason for this is because the larger the surface area is, the higher the concentration of enzymes is. When there are more active sites, there is going to be more a possibility

  2. Investagating the Action of the Enzyme Catalase On the Surface Area of a Potato.

    Each set will have a fair advantage if the experiment is conducted at room temperature. * The measuring cylinder when collecting over water should not press the tube that is connected from the flask to the plastic tub as this can lead to the amount of oxygen being produced to decrease and make the results unreliable.

  1. Investigate how the surface area of the potato affects the amount of oxygen produced ...

    At about 60 degrees Celsius the rate of reaction ceases altogether. This is because enzymes at high temperatures are denatured. Every enzyme has its own range of pH in which it functions most efficiently. Most intracellular enzymes function best at around neutral pH (pH7).

  2. find out if changing the surface area of a potato chip will have an ...

    The enzyme has enough heat energy to help it move around, and it hasn't too much heat energy that it starts to denature. This is the best temperature that it can break down Hydrogen Peroxide. Here is a graph to summarise my prediction.

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