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

Rates Of Reaction

Extracts from this document...

Introduction

Science Coursework- Rates of Reaction Aim: My aim of my coursework is to investigate factors that affect the rate of reaction. Before I chose what I am going to investigate I first brainstormed some ideas about what affect the rates of reaction/ speeding up reactions. Here are the ideas I came up with: * Temperature * Concentration * Surface area * Volume of reactants * Mass of reactants * Add a catalyst After looking at these things that would increase a reaction I decided that would investigate concentration. I made this decision because it was an investigation that I would be able carry out in the period of time I was allowed and I had the equipment and solutions available to me, to carry out the investigation. The only other one I could have possibly investigated would have been an Increase in temperature however I decided not to investigate this any further. I did not use either gas or a catalyst, as they would be un-performable investigation to make within a school laboratory. That is why I decided on the variable I did. Hypothesis: I predict that as I increase the concentration of hydrochloric acid the quicker the reaction between the hydrochloric acid and calcium carbonate will be. ...read more.

Middle

Then I will divide 1/ the average time for each experiment. * After completing a final results table with average times for each experiment and with the rate of reaction I will write my conclusion discovering if my hypothesis was right and then plot a line graph and evaluate my coursework. To make sure my investigation is fair I am going to use all the same equipment I am going to have the same person timing so we have fair stop and start points. We will use the same measuring cylinders also that we always get the same measurements. I have chosen measuring cylinders that hold the specific amount of solutions and water I need to make my investigation more reliable. Although I will be varying my concentration I will be keeping the temperature, particle size and quantity of solution A the same. I will be keeping the temperature the same as an increases temperature speeds up the reaction which would interfere with the results of my investigation and chosen variable. The stop watch I will use with measure seconds to 0.01 seconds this will not only make my investigation fair as I will be using the same equipment through out but it will also help to support my final results. ...read more.

Conclusion

The particle diagram below shows my thoughts here: If I were to predict where the graph would go next I would say that it is going to reach a maximum point at which it cannot go beyond, it is unable to accede where it reaches when it reaches the maximum point. I predict this because once a Solution A particle is completely surrounded by solution B particles it is unable to alter anymore. The diagram below explains this: Once it is surrounded it does not matter how much Solution B's concentration is increased it cannot affect the fact Solution A is surrounded. Although my prediction is supported by my results I cannot say that my prediction was right. All my results suggest that if you double the concentration then you double the rate of reaction and that is what I set out to do support my prediction. And although I have done this I can not say my prediction is right. I have not a carried out the right investigation to say whether or not my prediction is correct. I would need to use a more reliable experiment to say that my prediction was right. I have however gathered more supporting evidence to suggest that my prediction was correct. I have proved that if you double the concentration than you double the rate of reaction. Evaluation: ...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. A-Level Investigation - Rates of Reaction – The Iodine Clock

    (2). Add to this 2ml of 0.025 Molar Sodium Thiosulphate and 10ml of 1 Molar Sulphuric Acid - All volumes are measured from the prepared biurets. (3). In a separate 250ml conical flask, collect 10ml of 20 volume Hydrogen Peroxide.

  2. Investigating Rates of Reactions

    But it is also highly likely that I have not reacted sufficient magnesium ribbon with the acid, which could suggest for the declined rate. Either way this shall be accounted for later when I use this data to construct a graph, showing the effect of concentration against rate.

  1. Science Coursework

    The second graph graph b was showing the rate of reaction against the concentration of sodium Thiosulphate . I drew a line of best fit. the graph shows that the lower the concentration the lower the rate. The graph therefore followed my prediction.

  2. Chemistry Coursework Plan: The aim of this experiment is to analyse and understand rates ...

    The factors that may affect the rate of reaction are:- temperature of the Hydrochloric Acid, mass of the magnesium ribbon used, concentration of the Hydrochloric acid, surface area of the magnesium ribbon used All of these factors will change the rate of reaction because of the Collision Theory.

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