rates of reaction

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Rates of reaction coursework

The rate of reaction is the speed in which the reaction occurs. For a reaction to take place, the particles that are reacting have to collide. If they collide, with enough energy and pressure to turn, then they will react and form a compound. There are 4 factors what effect the rate of reaction. Firstly temperature will effect the rate of reaction as there will be more energy in the particles making the particles faster resulting in more chance of collision. Secondly concentration and pressure will effect it as if there is more pressure there will be more particles within a given space therefore particles will collide more often resulting in the rate of reaction increasing. Thirdly the size of the particle will effect the rate of reaction as if the particle is smaller the greater the area that the reaction can take place in. Lastly a catalyst is a chemical what we add what will increase the surface area, so there is more chance of collisions to take place, at the end of the reaction the catalyst can be removed.

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The reaction of the collision theory:

Sodium thiosulphate+hydrochloric acid         sodium chloride+ sulphur dioxide + water +sulphur

 

My prediction

I predict that as I increase the concentration of the sodium thiosulphate the rate of reaction will increase. This is because the number of particles will increase meaning more chance of collision further resulting in the rate of reaction to increase.

Apparatus

Conical flask

Hydrochloric acid

Sodium thiosulphate

Thermometer

Paper with cross

Stop watch

Measuring cylinder  

Concentration of sodium thiosulphate

In order to change the concentration I will make ...

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This is a routine task of limited complexity. The appropriate level of scientific vocabulary is used. However with no results data or graphs included the quality of the report is limited. Specific strengths and improvements have been suggested throughout.