Abstract
The rate of a chemical reaction first received serious study in 1850 when the German chemist Ludwig Wilhelmy (1812–1864) studied the rate of the inversion of sucrose using a polarimeter to follow the reaction at different concentrations of sucrose and acid (Laidler in The world of physical chemistry. Oxford University Press, Oxford (1993) [1], Wilhelmy in Poggendorff’s Ann der Phys Und Chem 81(2):413–433, 499–526 (1850) [2]). He measured the rate of change of the sugar concentration to be proportional to both the sugar and acid concentrations. This was the first time that a differential equation \( \left( { - dc/dt = kc} \right) \) was integrated to obtain an expression for ‘c’ as a function of time, assuming the rate was proportional to concentration.
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References
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de Berg, K.C. (2019). The Reaction and Its Kinetics. In: The Iron(III) Thiocyanate Reaction. SpringerBriefs in Molecular Science(). Springer, Cham. https://doi.org/10.1007/978-3-030-27316-3_7
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