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

Find out how the temperature affects the rate of reaction.

Extracts from this document...

Introduction

Investigation: Rates Of Reaction Aim: Our aim is to find out how the temperature affects the rate of reaction Research: Reference - Encyclopaedia 2002 Reaction, Rate of, amount of a substance that takes part in a chemical reaction in a given time. Chemical reactions happen at widely different rates. The weathering of buildings and statues caused by acid rain is very slow, but the reactions that take place when a firework explodes are very fast. Most reactions take place at a rate somewhere between that of a firework explosion, which is almost instantaneous, and that of weathering stone. Finding out how quickly reactions take place and understanding why they happen at the rate they do is very important to the chemist. Speeding up useful reactions and slowing down harmful ones can be important in industrial production processes, and in activities such as preserving buildings or foodstuffs. ...read more.

Middle

If it is cooled, it takes longer to become cloudy. The rate of a reaction can be obtained by following some measurable property that alters as the reaction occurs. Examples of such measurable properties include gas volumes, concentration of reaction mixture, and electrical conductivity. 2HCl + Na2S2O3 2NaCl + S + SO2 + H20 Prediction: I predict that as the temperature is increased the rate of reaction will increase. I also predict that as the concentration of the sodium thiosulphate increases the rate of reaction will increase. Key Factors: * Temperature * Concentration * Time Independent Variable: The temperature Dependant Variable: The time Control Variables: * The concentration * The amount of sodium-thiosulphate solution put into the flask * The amount of dilute hydrochloric acid put into the flask Collision Theory: Before we can get a chemical reaction, particles must crash together. ...read more.

Conclusion

20 (Room temp) 128 30 51 40 30 55 23 70 8 80 4 Graph Of Results: Evaluation: I don't think my results were reliable enough to draw an accurate conclusion to how temperature affects the rate of reaction, however they did prove my basic theory. To improve my results I could have done more preliminary work to make sure my method was as accurate as possible and that I was more familiar with doing the experiment. If I was to extend the experiment I could try seeing how different variables affect the rate of reaction, for example the concentration of acid. Before doing this, I think it would be a good idea to repeat the experiment investigating temperature to improve my results. Conclusion: From my results I can see that my prediction was correct and the time it took for the cross to disappear did decrease as the temperature was increased. I could carry on past 80� to see if the trend continued but it would eventually become too difficult to get an exact time. ...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. The aim of this investigation is to find out and observe how temperature affects ...

    requirement stated in the collision theory that are: To react particles must collide with enough energy to break existing bonds and with the correct orientation to bring reactive sites close together. Bringing the reactive sites closer together means that the likelihood of a reaction occurring is increased so in a

  2. How temperature affects the rate at which bread dough rises and find out the ...

    taken by the reaction -The Collision theory Show that when particles collide between each other more often so they give up more successful collisions. When there are more successful collisions the solid is used up quickly so the reaction speeds up.

  1. Investigation to find out how temperature affects the rate of reaction

    but at 32�C the time taken for the reaction to finish was 80 seconds which means that there is a whole 10 second difference between the reaction times at only 2�C more. At 25cm3 of HCl the time taken for the reaction to finish was 15 seconds at 30�C and

  2. Investigation into how temperature affects the rate of reaction between SodiumThiosulphate and Hydrochloric Acid.

    Successful Collisions In the above text I have often mentioned "successful collisions" and how by increasing the chance of these successful collisions the rate of reaction is increased. Therefore to fully understand my experiment I must know what they are.

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