|Rate Determining Step|
|When a reaction is the result of a series of elementary processes,
the rate of the overall reaction is determined by the slowest reaction in
|eg. Ag+(aq) + Cl-(aq) ---> AgCl(s)
a simple reaction involving only a single 1 step mechanism therefore very fast.
|eg. 2 NO(g) + 2 H2(g) ----> N2(g) + 2 H2O(g)
This appears to be a 4 particle reaction as written. Impossible!!
|The reaction mechanism for the above reaction has been determined
|step #1 2 NO + H2 ----> N2 + H2O2
slow since it invovles a rare three particle collision. This
is the slowest and therefore is the step that determines the rate of all
the other steps.
|step #2 H2 + H2O2 ------> 2 H2O fast reaction|