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S-19
4.a)
Write the rate law for the following reaction, if it were to occur through a single-step mechanism.
2 I
-
(aq)
+ S2O
8
2-
(aq)
2 SO
4
2-
(aq)
+ I
2(aq)
By examination of the experimentally determined rate law, explain whether this reaction does
in fact proceed through a single-step mechanism. Explain. (0.6 marks).
