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Sodium Thiosulphate Reaction.
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| Submitted: Tue Nov 25 2003
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PLAN: The aim of this investigation is to observe how varying the concentration of a solution affects its rate of reaction. I will conduct the same experiment five times, but each time changing the amount of sodium thiosulphate and water that I use. The amount of hydrochloric acid that I use will remain constant throughout the experiments. The amounts of acid, sodium thiosulphate and water that I will use are as follows: Sodium Thiosulphate Water Hydrochloric acid 50cm3 0cm3 10cm3 40cm3 10cm3 10cm3 30cm3 20cm3 10cm3 20cm3 30cm3 10cm3 10cm3 40cm3 10cm3 METHOD: For the first experiment I will measure out 50cm3 of sodium thiosulphate and put it into a beaker. During this experiment, I will use no water. I will then place this beaker on top of a piece of paper with a cross drawn in the centre of it. I will then add 10cm3 of hydrochloric acid to the beaker, and immediately start timing the reaction. When the cross can no longer be seen, the reaction is complete. I...
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