引用:
原帖由 mwlc331 於 2012-2-26 09:28 發表 
chemistry
Question is here
The reaction between hydrochloric acid solution and sodi um thiosulfate produces a precipitat of sulfur that makes the resulting solution go cloudy. The reaction is carried out in a conical flask, which has been placed on a piece of paper with a cross.
The rate of this reaction can be measured by timing how long it takes for the solution to go so cloudy that the cross can no longer be seen through the solution.
2HCI(aq)+Na2S2O3(aq)=S(s)+SO2(g)+2NaCI(aq)+H2O(l)
(a) Describe how the rate of this reaction would change if the reaction was repeated:
(i) with a more concentrated hydrochloric acid
(ii) at a lower temperature
(b) Discuss how decreasing the concentration of sodi um thiosulfate and decreasing the temperature of the reactants affects the reaction rate. In your answer, you should refer to :
particle collision
activation energy
the reaction between hydrochloric acid and sodi um thiosulfate.
[
本帖最後由 mwlc331 於 2012-2-26 09:36 編輯 ]
