For pseudo first order reaction, the reaction should be first order with respect to ester when [H₂O] is constant. The rate constant k for pseudo first order reaction is 0 2 C 2.303 k log where k k' H O t C From the above data we note t/min C/mol L-1 k/min-1 0 30 60 90 0.8500 0.8004 0.7538 0.7096 - 2.004 x 10-3 2.002 x 10-3 2.005 x 10-3 We can now determine k’ from 3 1 2 1 3 1 5 1 1 k ' H O 2.004 10 min k ' 55molL 2.004 10 min k ' 3.64 10 mol Lmin x x x
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