Here is the word and symbol equation for the reaction:
Sodium + Hydrochloric Sulphur + Sulphur + Water + Sodium
Thiosulphate acid Dioxide Chloride
Na2S2O3 + 2HCl S + SO2 + H2O + 2NaCl
As you can see from the word equation there are a lot of bonds to break in this experiment so the more "HCl's" there are the quicker it will be to break the Sodium Thiosulphate. You can also see that two "HCl's" are needed to successfully break down one Sodium Thiosulphate molecule. So this would mean that the more "HCl's" the better. So for my experiment I will create five different measurements of Hydrochloric acid (0.1M-0.5M in steps of 0.1M) and react it with Sodium Thiosulphate and time how long it takes for the "X" to disappear under the beaker. I will always use 50ml3 Sodium Thiosulphate and 5ml3 Hydrochloric acid. I will then record my results onto a table and then on to a graph. To make my experiment I will measure the time to two......
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