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

To find out the effects of changing the surface area of a potato chip has on the rate of reaction between catalase and hydrogen peroxide.

Extracts from this document...


Aim: To find out the effects of changing the surface area of a potato chip has on the rate of reaction between catalase and hydrogen peroxide. Background Information: The catalase, which is an enzyme, is found in the cells of plants and animals so potato will be used in this experiment. It breaks up hydrogen peroxide into water and oxygen. An enzyme is a chemical, which makes a reaction happen more quickly, they are also known as biological catalysts. Enzymes can be affected by pH, temperature or the concentration of the enzyme or the substrate. Basic Plan: In the preliminary test, measure the height of foam in different temperatures every minute, to see which temperature the experiment should be kept at. In the main experiment we are going to measure the volume of gas given off every 30 seconds. Factors and Fair Testing: The temperature the solution has an affect on the experiment. The higher the temperature of the solution, the quicker the reaction, until it reaches a certain point. Then the rate of reaction will then decrease. This is due to the kinetic energy of the particles within the solution. ...read more.


This is due to the increase of enzymes in the same amount of volume and therefore the more active sites available, the quicker the substrate (hydrogen peroxide) can be broken down. The surface area of the potato would affect the experiment due to the increase of catalase on the outside of the potato for the hydrogen peroxide to react with. As the catalase is contained within the cells, the more cells that are exposed to the hydrogen peroxide, the more enzymes there are to react with. The number of active sites increases and this increases the number of enzyme substrate complexes, which then release more hydrogen. This is the factor we are going to use in our experiment and change the length of the potato chip with the width remaining the same. Equipment List: * 5 test tubes * Test tube rack * Knife * Potato chips (width and depth of 1cm) * Measuring cylinder * Hydrogen peroxide 6% concentration * Goggles * Stopwatch * Delivery tube * Tub full of water * Measuring cylinder Method: 1. Set up the equipment as in the diagram above. 2. Cut up 5 strips of potato, one strip 1cm long, one strip 2cm long etc. (All strips have a width of 1cm) ...read more.


2.6 3.0 2 1.5 3.5 4.5 5.0 6.5 7.0 7.6 8.5 9.4 10.0 3 1.5 3.5 4.5 5.5 6.5 7.5 8.5 9.4 10.3 11.0 4 2.4 3.5 5.4 6.5 8.0 9.0 10.5 11.5 12.5 13.5 5 5.0 6.0 8.5 10.5 12.0 13.5 15.0 16.5 17.5 19.0 3rd attempt 1 2 2.0 2.5 3.5 4.2 5.0 5.5 6.5 7.0 7.5 8.0 3 1.5 3.0 4.5 5.0 5.0 6.0 7.0 8.0 8.5 9.5 4 3.0 3.5 5.2 6.4 7.5 8.5 9.3 10.5 11.4 12.2 5 4.0 5.5 7.0 8.0 9.4 10.5 11.5 12.5 13.5 14.5 Average Set (used for graph) Average Length of Potato (cm) Volume of Gas (cm�) (correct to decimal places) 0.30 minutes 1 minute 1.30 minutes 2 minutes 2.30 minutes 3 minutes 3.30 minutes 4 minutes 4.30 minutes 5 minutes 1 0.77 0.93 1.50 2.17 2.93 3.20 3.67 3.67 4.53 5.00 2 1.50 2.67 3.50 4.15 5.17 5.58 6.37 7.00 7.63 8.17 3 1.33 2.83 3.67 4.50 5.17 6.00 7.00 7.80 8.50 9.33 4 2.47 4.00 6.20 7.30 8.33 9.67 10.77 11.83 12.89 13.78 5 4.67 6.50 8.17 9.83 11.30 12.67 13.83 15.08 16.17 17.33 Conclusion of Results On the graph, the potato chip with the largest surface area had the greater gradient. Carol James 10R Biology Coursework ...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)

    This is especially important in metabolic reactions inside the body where the temperature is reasonably high (37 C). We cannot raise our body temperature much above 40 C because this would cause damage to the molecules in our body. The solution to this is enzymes.

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

    The catalyst can change a solution due to the enzymes a catalyst contains. Enzymes work best at temperatures higher than body heat (which is 370C). Enzymes are an important group of chemicals that speed up chemical reactions. They act as catalysts, which break things down.

  1. The effect of hydrogen peroxide on catalase if you change the temperature.

    Care was taken to view the syringes from the side to ensure the bottom of the meniscus was lined up properly with the gradations and there were no air bubbles in the syringe. A pH buffer was added to the boiling tubes to maintain the pH at a constant level

  2. For my coursework I had to study enzymes (catalysts) and the rate of reaction ...

    outliers as we cannot guarantee the performance of the equipment and the variables surrounding it. I also predict that the Preliminary test will go in my favour and support my hypothesis. This will then be further supported hopefully, by the reliability of my graph.

  1. Investigate the effect of surface area on the rate of reaction of the enzyme ...

    In the 3rd test, it will be cut twice etc.) I will cut the potato rod equally and carefully, so it will be easier for me to measure the total surface area of it. I predict the time needed to for the liquid to move up 10cm in the manometer

  2. Find out what affect the surface area of a potato chip has on the ...

    If the colliding molecules have the right orientation but not enough energy, then they cannot react and so again would not form the end products. This theory is not only for simple elements and molecules, it also applies to Enzymes and organic reactions.

  1. The Effect Of Changing The Surface Area Of Potato On The Breakdown Of Hydrogen ...

    take place, and hence the amount of oxygen produced in the time limit will be more or less depending on whether the concentration is low or high, which would make this an unfair test. PH level With extreme ph levels the enzymes can be destroyed, and hence the reaction will not take place.

  2. Investigate if the rate of reaction between Hydrogen peroxide and the enzymes on a ...

    When the cell dies, its membrane becomes permeable, and the enzyme can then enter the cell and destroy the protein within it. There are a few factors that affect how fast the enzymes work, they are listed below- Temperature The temperature at which the enzymes are placed in are very

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