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

Investigating how the temperature can affect the Rate of Reaction.

Extracts from this document...

Introduction

Biology - Investigating how the temperature can affect the Rate of Reaction Aim To investigate the effect of enzyme concentration on the rate of reaction the enzyme controls, using amylase and starch to illustrate this. Hypothesis I predict that the more concentration of amylase there is added to the solution, means the more number of particles there would be. This would mean the number of collisions would increase so the time would decrease as the concentration of amylase increases Equipment used - Boiling Tubes X 5 - to conduct experiments in - Test Tube rack - to hold up the test tubes - Large Syringe - to measure 5cm� of starch - Small Syringe - to measure different amounts of Amylase - Pipette - to measure precisely the volume used in each experiment is the same - Iodine Solution - used as a test for starch - Benedict Solution - used for reducing sugars (glucose, maltose etc) - Amylase - - Starch - - Spotting Tile - Stop Clock Method Firstly, 50cm� of sodium thiosulphate, measured using a measuring cylinder, is heated or cooled either using a Bunsen Burner or Ice, to reach a certain temperature. ...read more.

Middle

Also if the amount of sodium thiosulphate was more, it will affect the experiment, because the more sodium thiosulphate in the experiment, the more particles, meaning it will affect the Rate of Reaction. Safety Test When dealing with acids in a lab, you should always wear goggles in case there is a spillage, which could be very harmful and cause the Acid to burn your skin and eyes, Another basic rule when in the lab working with Acids is, never run around. This floor could be very slippery and if your holding acids you could harm yourself and others working nearby. Always tie your hair when doing practical experiments, especially when working near a Bunsen Burner. You could get distracted for a moment and the situation could be fatal. Observation Here are the Results I have collected from my experiment in the form of a table: Table Table showing my First set of Results at Different Temperatures Temperature (�C) Time (Seconds) 10� 51.55 15� 45.02 20� 25.28 25� 24.75 30� 23.43 40� 06.53 50� 05.63 60� 04.18 From Table 1, it is clear to see that there is a steady decrease in the amount of time taken for the solution to turn cloudy. ...read more.

Conclusion

Another problem I encountered was with the stop clock, which made the test very unfair as each time I started the experiment I kept pressing the wrong button, and by the time I got it right, the experiment had already turned cloudy. To make the experiment more accurate next time, I should let one partner do the timing, and let the other pour the hydrochloric acid into the beaker. The test could have also been more accurate if I repeated the experiment a couple more times, thus getting a more accurate result or even by making the temperature go up by 2�, where I would have been able to see where exactly the Rate of Reaction begins to speed up and at what Temperature. Also, a burette could have been used to measure the volume more accurately, to give a more precise volume. This test may have also been unfair due to the lack of accurate equipment. Overall, I am pleased with my results and findings, and have a better knowledge of how a Reaction such as Sodium thiosulphate and Hydrochloric Acid can be affected by not just the surface area, a catalyst and the concentration, but also the temperature. Nina Hurhangee 11 Miranda ...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 Patterns of Behaviour 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 Patterns of Behaviour essays

  1. Rates of Reaction - The Iodine Clock

    Table 1.2 Reagent Concentration Volume (ml) Na2S2O3 0.025M 10 KI 1M 8 H2SO4 1M 5 When varying volume H2SO4: (H2SO4 volumes 10, 12, 14, 16, 18, 20ml - 0.1M) Table 1.3 Reagent Concentration Volume (ml) Na2S2O3 0.25M 8 H2O2 20 Volume 10 KI 1M 10 Each solution that is made

  2. The Iodine Clock Investigation

    The presence of H2SO4 is required however for the reaction to proceed, it can therefore be deduced that it is acting as a catalyst, and is not a factor that should be investigated. Problem 2 Before the effects of temperature on reaction rate can be investigated in the main investigation,

  1. Activity of Diastase On Starch

    Effect of change in concentration of starch in the rate of hydrolysis of starch. For investigating the rate of hydrolysis of starch I prepared the following solutions. 100ml of 1% starch solution. 100ml of 2% starch solution. 100ml of 3% starch solution.

  2. Free essay

    Close Your Eyes

    "I love you" were the only words that came out of her mouth. What the hell? "Who was that?" I asked and she turned her head quickly "I have to go" she said almost immediately down the phone and hung up "Well, Who was it?"

  1. Does the Volume of Amylase Affect the Rate of Reaction between Amylase and Starch?

    The light absorption of this substance is measured and the machine is calibrated to this substance's light absorption reading. Now, when another substance is placed in the colorimeter, the colorimeter will display whether and when (if reaction is taking place)

  2. Investigating the effect of enzyme concentration on the hydrolysis of starch with amylase.

    The more amylase molecules there are, the higher the probability of collisions occurring. An increase in total number of collisions consequently results in an increase in the number of effective collision, this means the rate of the reaction will increase.

  1. The effect of temperature on the reaction between amylase and starch

    (These collisions can be explained best with and by the collision theory. This theory explains that no reaction can take place without particles colliding.) The collisions are so energetic, that the hydrogen bonds that hold the proteins together to form the enzyme begin to break.

  2. The Iodine Clock

    Diagram 2: I would predict the graph made to look something like this: With the time it takes for the experiment to work gradually increasing, although the reaction would not be able to take place when there is only sodium thiosulphate present and so would take infinity time.

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