89.4 Determination of the reaction order 9.4.1 Integration methods--trial and error The integration methods are to use the integrated rate equation to determine the order of the reaction (1)The attempt method C2 ONa+ C2HS(CH3)2SI>Nal+ C2HSOCHs + S(CH3)2 r=k[C2H, ONa]aC2 Hs(CH)2SI] A+B→>Pr=k[A][B] The values of k can be calculated from the selected integrated equation from a knowledge of initial concentration(co)and the concentration at various time intervals(c). If the reaction is of the selected order of reaction, the k at different intervals thus obtained should be the same(1) The attempt method: The values of k can be calculated from the selected integrated equation from a knowledge of initial concentration (c0 ) and the concentration at various time intervals (c). If the reaction is of the selected order of reaction, the k at different intervals thus obtained should be the same. A + B → P C2H5ONa + C2H5 (CH3 ) 2 SI → NaI + C2H5O C2H5 + S(CH3 ) 2 r = k[C2H5ONa][C2H5 (CH3 ) 2 SI] r = k [A][B] 9.4.1 Integration methods—trial and error The integration methods are to use the integrated rate equation to determine the order of the reaction. §9.4 Determination of the reaction order