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Nic Carpenter 11PF 20/9/03 How I can change the rate of reaction Planning I am going to investigate the rate of reaction between Hydrochloric acid and Sodium thiosulphate. I will do this by mixing the two chemicals together, and waiting until the two react with each, and a cloudy substances as been formed and I can no longer see an "X" that will be placed under the beaker. I will time how long it takes for the reaction to happen. The rate of reaction mostly depend s on the collision theory. This simply means how hard and how often the particles of the two chemicals collide with each other. The harder and the faster the two chemicals collide the quicker the rate of reaction will take place. The main key factors that will affect this experiment are: * Temperature: this will increase the speed of the particles so there's going to be more collisions. * Volume of...

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