To investigate how concentration affects the rate of reaction.

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                        To investigate how concentration

                             affects the rate of reaction

My aim in this investigation is to find out if and how concentration affects the speed of reaction of two substances when they are mixed together.

         Firstly I will research and use my own scientific knowledge to make an prediction to  I plan on setting up an experiment to find this out and at the end I will record all my results and convey them in chart and graph form. Once I have done this I will analyse my results and look for significant patterns. Finally I will draw a conclusion of all the findings I have made in this experiment.

        The two liquids I plan on reacting together are hydrochloric acid (HCl) and sodium sulphate (NaSO4). By altering the concentration of hydrochloric acid I will time how long different concentrations of hydrochloric acid take to react with the same concentrated sodium sulphate.                                                                                                                          

        Now I will plan on how to go about this experiment. By doing research I have also found that there are factors I need to consider which may modify the reaction rate. These are the factors that I will take into account and control:

§         Temperature

§         Concentration

§         Catalyst

§         Size of particles (surface area)

         

          I have chosen to investigate the concentration of hydrochloric acid and how it affects the rate of reaction of Sodium sulphate.

        To make my experiment a fair test I am going to use the same solutions. I will repeat the experiment again so that I will have three sets of results and then get work out an average set of results. This will allow me to have a set of accurate results.

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As I mentioned before, the rates of reaction depends on four things. All four methods of increasing the rate of reaction can be explained in terms of increasing the number of collisions.

Temperature increases the number of collisions. When the temperature is increased, the particles all move quicker. If they’re moving quicker, they’re going to have more collisions.

Reactions only happen if the particles collide with enough energy. At a higher temperature there will be more particles colliding with enough energy to make the reaction happen. This initial energy is known as the activation energy, and it’s needed to break ...

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