For the series reaction Ak1Rk2S, it is observed that the first step follows a first orderkinetics while second step follows a zero order kinetics. If this reaction takes place in a batchreactor with CRo= CSo=0,showthattR,max= (1/k1) ln [(k1CAo)/k2] and alsoCR,max/CAo= 1 - [k2/(k1CAo)] {1 - ln [k2/(k1CAo)]}. Where 'k1' and 'k2' are rate constants,tR,maxis the time at which the maximum concentration of 'R' is obtain and CR,maxis themaximum concentration of 'R'