Rates of reaction - kinetics (A2)
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HI. I'm doing an investigation on the effects of concentration on the rate of reaction. I've seen the reaction between HCl and sodium thiosulphate but I'm investigating the reaction between sulphuric acid and sodium thiosulphate. I'm trying to deduce the overall equation but I'm not certain. When I look at the reaction with HCl I note that the products are sulpur, SO2, sodium chloride and I think water as well. So I was wondering if I would get sulphur in its solid state, SO2, sodium sulphate and water. I've looked for the equation everywhere but can't seem to find it. Please help me!!
Corrie writes ...
The full equation for the reaction between sodium thiosulphate and HCl is:
Na2S2O3(aq) + 2HCl(aq) -> 2NaCl(aq) + S(s) + SO2(g) + H2O(l)
With sulphuric acid you would get sodium sulphate instead of sodium chloride, as you say.
The simplified ionic equation, leaving out the ions that do nothing, for both reactions is:
S2O32-(aq) + 2H+(aq) -> S(s) + SO2(g) + H2O(l)
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updated: 14 October 2007
