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The rate of reaction between sodium thiosulphate and hydrochloric acid

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  • Essay length: 1512 words
  • Submitted: 07/12/2005
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GCSE Patterns of Behaviour

The first 200 words of this essay...

Rates of Reaction Investigation

PLAN

Aim:

An investigation to find the effect of changing the concentration on the rate of reaction between sodium thiosulphate and hydrochloric acid.

Safety Precautions

* Tie hair back

* Wear goggles at all times

* Be careful when using the chemicals

* Do not run

* Do not sit down during experiment

* Tuck in bags and stools.

Fair Test

To make the experiment a fair test, it must be carried out by:

* Using the same equipment each time

* Keeping a control to determine whether the experiments have worked correctly

* Making sure all of the independent variables are controlled, except ONE which is changed

* Make sure the stopwatch is always started at the same time for each test

* The temperature should be the same for each test done

Prediction

I think that the higher the concentration of sodium thiosulphate solution, the quicker the cross will disappear. This means that the graph will have positive correlation. This is explained by the collision theory. Particles have to collide for a reaction to

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