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The isolation method.
Member rating: No Rating | Words: | Submitted: Mon Dec 22 2003
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The Isolation Method Simplifying nth Order Reactions to use Simple Integrated Rate Equations Introduction Many mechanisms of reactions are categorised by a rate-limiting step, thus the rate of the reaction is hindered by a slow step that the reactions must overcome. In this practical a catalyst (H2SO4-) is used to increase the rate of the reaction, without being consumed in the reaction. The reaction below is a reaction that uses a catalyst in order to react: CH3COCH3 + I3 › CH3COCH2I + 2 I- + H+ In theory, if the catalysed reaction is quicker than the uncatalysed one, then the equation can be written in the form below: Rate = k [CH3COCH3]m [H2SO4-]n [I3-]p Although the constants can be found by using initial rate equations, in this practical, iodine is isolated. Therefore, the disappearance of this reactant is monitored as the other reactant concentrations are kept constant. In order to isolate one reactant, the concentration is kept...
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