The initial rates of reaction 3A + 2B + C → Products, at different initial concentrations are given below: Initial rate M s–1 [A]0 , M [B]0 , M [C]0 , M 5.0 × 10–3 0.010 0.005 0.010 5.0 × 10–3 0.010 0.005 0.015 1.0 × 10–2 0.010 0.010 0.010 1.25 × 10–3 0.005 0.005 0.010 The order with respect to the reactants, A, B and C are respectively

From 1st and 2nd sets of data - no change in rate is observed with the change in concentration of ‘C’. So the order with respect to ‘C’ is zero. From 1st and 4th sets of data Dividing eq. (4) by eq. (1) x 3 3 1.25 10 0.005 0.010 5.0 10 x x x 2 x or0.25 0.5 or 0.5 0.5 x 2 The order with respect to ‘A’ is 2 from the 1st and 3rd sets of data dividing eq. (1) by eq. (3) y 3 2 5.0 10 0.005 0.010 1.0 10 x x 1 y or 0.5 0.5 y 1 >> The order with respect to ‘B’ is 1 So the order with respective the reactants A, B and C is 2, 1 and 0.