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Investigating the rate of reaction between sodium Thiosulphate and hydrochloric acid Introduction In this investigation, I am going to analysis the rate of reaction between Hydrochloric acid and Sodium Thiosulphate. When planning this investigation there were various ways in which I could have tested the rate of reaction. These included; changing the temperature of the chemicals or even adding different amounts of water/chemicals to the solution. I already know that when a dilute acid is added to Sodium Thiosulphate solution a pale white precipitate of sulphur is formed. This will allow me to know that a change has taken place. The equation for this is; Na2S2O3 (aq) + 2HCl (aq) _ SO2 (aq) + S(s) + H2O (l) + 2NaCl (aq) Equipment When carrying out thin experiment, I will be using the following: Beaker Cross drawn on paper, Diluted water, Hydrochloric acid (same concentration each time), Sodium thiosulphate (different concentrations), Measuring cylinders (One for each chemical), Safety goggles, Stop Watch, Thermometer. Variables To make the test fair...

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