The times taken for iodine to be liberated in the reaction between sodium thiosulphate and hydrochloric acid at various temperature are as follows. These results suggest that
The iodine liberation process is significantly affected by the amount of acid, that of potassium iodide added, the waiting time for the liberation, and light; therefore, the process plays a key role for the accuracy of the titration results.
For a 10\(^0\) rise in temperature, time of reaction is halved i.e as temperature increases from 25 - 35, time of reaction is halved from 72 to 36.
However, recall that rate of reaction = \(\frac{1}{time of reaction}\)
⇒ They are inversely proportional. Which means for a 10\(^0\) rise in temperature, if time of reaction is halved, then rate of reaction will be doubled.
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