Hypothesis: In the investigation of the rate of reaction and concentration of Sodium Thiosulphate. I predict that the higher the concentration of sodium thiosulphate solution, the faster the rate of reaction because if the solution is made more concentrated it means there are particles of reactant knocking about between the water molecules. This makes collisions between the important particles, more likely. I also predict the sulphur precipitate will turn the solution a cloudy yellow and …showed first 75 words of 306 total…

…showed last 75 words of 306 total…cm3 Na2S2O3 30cm3 HCL2 To 50cm3 Na2S2O3<Tab/> 0cm3 HCL2 Fair test: In order for my investigation to be a fair test I will have to carry out the following corrections: 1. To use the same amount of HCL2 2. Make sure the solution is the same volume 3. Start the clock immediately when all the solutions have been handed in. 4. Then stop the clock immediately when the x disappears.