Investigating Reaction Rates of Sodium Thiosulphate and Hydrochloric Acid

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Investigating Reaction Rates of Sodium Thiosulphate and Hydrochloric
Acid

Aim:

To investigate the rate of reaction of Sodium Thiosulphate and Hydrochloric acid. In this investigation I will be varying the concentration of Sodium Thiosulphate only and not the Hydrochloric acid concentration.

In this investigation I will use the following word equation:

Sodium Thiosulphate + Hydrochloric acid

In this investigation I will use the following symbol equation:

Na2S2O3 + Hcl

Prediction:

I predict that as the Sodium Thiosulphate concentration increases the rate of reaction will also increase.

The reason I predict this is because there will be a higher concentration of
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The collision theory explains all there is to the rate of reaction. The collision theory states that the rate of reaction depends on how often and how hard the reacting particles collide. Reacting particles need to collide with each other to be able to react. The more collisions there are then the faster the rate of reaction will be.

The following methods of increasing the rate of reaction can be explained by increasing the number of collisions between the reacting particles:

* Temperature- When the temperature is increased in a reaction the particles begin to move around much quicker. This means that when they collide with each other they will collide harder.

* Catalyst- A catalyst works by giving the reacting particles a surface to stick to on which they can collide with each other on. This also increases the number of collisions between the particles.

* Size- If one of the reactants is a solid it will have a smaller surface area than a solid that is broken up into smaller pieces. This allows the particles in the solution to have a bigger area to collide in.

* Concentration- A more concentrated solution means there are more reactant particles moving about amongst the water particles. This makes collisions between the reactant particles more
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