810 1 Typical complex reactions 10.1.2 Competing reaction/Parallel reaction d[B K1 B KIAI C2H4+H2o . C C2HSOH dt-R2LA C2H OC2Hs+H2O k(a-x)+k2(a-x)=(k+k2)(a-x) CO,+H When k1>>k2 =k(a-x HCOOH CO+HO When k,<<k k2(a-x dt The rate of parallel reaction is determined mainly by the faster one10.1.2 Competing reaction/Parallel reaction 1 [B] [A] d k dt = 2 [C] [A] d k dt = ( ) ( ) ( )( ) 1 2 1 2 k a x k a x k k a x dt dx = − + − = + − 1 2 When k  k ( ) 1 k a x dt dx = − When 1 2 k  k ( ) 2 k a x dt dx = − The rate of parallel reaction is determined mainly by the faster one. HCOOH CO2 + H2 CO + H2O §10.1 Typical complex reactions