Guy Burton 11AS
Chemistry Coursework
October 2003
Investigate the rates of reaction of Sulphur Dioxide and ___ _ Iodate solutions
Planning_______________________________________ ___
Clock reactions are chemical reactions which happen a certain amount of time after two chemicals have been mixed. The way in which my experiment works is…
In my experiment I am investigating the effect on varying the amount of each of the two chemicals, Iodate and Sulphur Dioxide, compared to the time elapsed between adding the two chemicals together and the reaction taking place. To keep the experiment as a fair test, the total volume of both reactants must be the same each time. To get around this we will add varying amounts of water to the mixtures to keep the volume constant. To give us enough scope for varying the amounts of reactants, we will use 40ml of reactants. This means we will start off with 20ml of each, and then continue to use 20ml of one, 15ml of the other and 5ml of water. Another factor required to keep the test fair is to keep a constant temperature, as this will probably have an effect on the time taken for the clock reaction.