Ch ical chemistr Reaction Kinetic Determination of the rate law Forn≠1 In a For (17.51) For a given n, there is a fixed relation between a and o for every reaction of order n Plot a versus logroo for commonly occurring values of n to give a series of master curves. (Fig. 17.6) The Powell-plot method requires the initial investment of time needed to make the master plots Table 17.1 gives the data needed to make the master plots5 Physical Chemistry Determination of the Rate Law  1 ( 1) 1 − = − − n n For n  1 ln  = − For n = 1 (17.51) For a given n, there is a fixed relation between  and  for every reaction of order n. Plot  versus log10 for commonly occurring values of n to give a series of master curves. (Fig. 17.6) The Powell-plot method requires the initial investment of time needed to make the master plots. Table 17.1 gives the data needed to make the master plots. Reaction Kinetics