Sofya Posted November 5, 2015 Report Share Posted November 5, 2015 Hello!I try to find the mechanism for the following chemical reaction:2KI(aq)+ H2O2(aq) + H2SO4(aq) Ã K2SO4(aq) + I2(aq)+ H2O(l) The rate equation I got is as following:Rate = k * [KI] * [H2O2] * [H2SO4]I was thinking about the following:2KI+ H2SO4 Ã K2SO4 + 2HI2HI+ H2O2 Ã I2 + 2H2O But it does not fit my rate equation.Maybe you can give me a hint? I think I am doing something wrong here.Thank you in advance! Reply Link to post Share on other sites More sharing options...
Msj Chem Posted November 6, 2015 Report Share Posted November 6, 2015 Rate expressions can only be determined experimentally and not from the stoichiometry of the balanced equation (unless it is an elementary reaction which has a single step). The rate expression that you have appears to be termolecular, which is unlikely because of the low probability of three reactant particles colliding with sufficient energy and correct geometry. To be honest, I am not sure what you mean by this: 'I was thinking about the following:2KI+ H2SO4 Ã K2SO4 + 2HI2HI+ H2O2 Ã I2 + 2H2O But it does not fit my rate equation.' Reply Link to post Share on other sites More sharing options...
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