14. Solution to Chemistry Problem

14. Solution to Chemistry Problem

1. When studying the kinetics of the methyl tosylate (MT) hydrolysis reaction at 25 C, the following spectrophotometric data were obtained at a wavelength of 261 nm
n-CH3C6H5SO3CH3 H2O=CH3C6H5SO3H CH3OH
t, h 0 5.0 9.0 18.0 24.0 44.0 67.0 infinity
D, 0.791 0.746 0.709 0.645 0.611 0.526 0.471 0.420
where D is the optical density of the solution D=e*l*CMT, where e and l are constants. Other reagents contribute to the value of D and therefore the difference deltaD=D-Dinfinity should be used for calculations. Show that the reaction is first order and determine the rate constant.

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