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Rates of Reaction Investigation.

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  • Essay length: 1153 words
  • Submitted: 10/10/2003
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GCSE Patterns of Behaviour

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Rates of Reaction Investigation


In this investigation I am going to investigate how fast the chemicals Hydrochloric Acid and Sodium Thiosulphate react. The four main variables that affect rate are:

o Temperature - if the reactants are heated/cooled they have more/less energy. If they have more energy there is greater chances of successful collisions meaning the reaction occurs faster.

o Concentration - if the solution is more concentrated there are more reactants there is a greater chance of successful collisions.

o Surface Area - if one reactant has more surface area there is greater chance of a successful collision as there is more area for the reaction to occur on.

o Catalysts - a catalyst is a chemical that speeds up a reaction without changing itself during the reaction. An example of this is an enzyme.

In this investigation however I am only going to investigate how concentration affects rate of reaction as the other methods of increasing the rate of reaction are not easily controlled and I do not know of a catalyst that will speed up the reaction.

Preliminary Work

In this preliminary work I am going

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