Investigating the Effect of Concentration on the Rate of Reaction between Hydrochloric Acid and Sodium Thiosulphate

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Planning Section

Investigating the Effect of Concentration on the Rate of Reaction between Hydrochloric Acid and Sodium Thiosulphate

I think that the higher the concentration of the Sodium Thiosulphate, the faster the reaction will take place. The more water there is in the solution, the slower the rate of reaction will be. This is because the greater the concentration, the more reactant particles there are in that certain solution. There will be more successful collisions and therefore the rate of reaction is increased.

Apparatus

To successfully carry out this experiment, I will need the following apparatus:

* Hydrochloric acid

* Sodium Thiosulphate

* Distilled water

* A beaker

* 2 measuring cylinders (one 50cm³ and the other 25cm³)

* A piece of paper with an "X" on it

* Safety goggles

* 2 pipettes

* Stopwatch

* Calculator

* Results table

* Pencil

Preliminary Experiment

In order to see in what way to carry out the main experiment, I have carried out a preliminary experiment. I have only recorded two results. For the preliminary, I used 0.1M sodium Thiosulphate.

Volume