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Prediction During this experiment I will be reacting sodium thiosulphate with hydrochloric acid. To ensure that my experiment is fair I will repeat the experiment several times. My prediction is that the rate of reaction is directly proportional to the concentration of the acid. Equipment * beaker * goggles * hydrochloric acid * Measuring cylinder * stopwatch * water * sodium thiosulphate * paper with cross * pipette and beret Safety During this experiment I will take a few safety measures to ensure that the experiment takes place safely. * Safety goggles * Wash hands during and after experiment * Wear a pair of rubber gloves Preliminary Work Before the actual experiment, I have decided to carry out a 'pre-test' to give me a rough idea of what results I will be expecting from the real experiment and to see if there is any need for last adjustments. For this preliminary experiment, I have decided to use five different concentrations of acid. Here...

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