AB----> A + B rate= k(ab)^2 by use of integrated second order rate law 1(/Ab)t = 1/AB)0 + Kt t= time k=constant (AB)0 =initial concentration (AB)t= final concetration
1/(ab)t= 1/1.5 + 0.20 x12.9 = 3.35 1/(ab)t = 3.25 multiply both side by ( ab)t 1= 3.25(ab)t divide both side by 3.25 (ab)t is therefore=0.308
