2. (20 points) The initial rates for the reaction of A and B under various initi

Question

2. (20 points) The initial rates for the reaction of A and B under various initial conditions are listed below. Determine the reaction order for reactant A. (A plotting grid is provided on the next page if you would like to plot something __ Alaa 154lo 0.00132 LBL(M)ine initial rate (M/s) 0.00200 O 0.18521 2 2.e 20030 0.406 0.00389 J.0.002 vS. t 0.448 54 0.00417 0.00200 0.00200 0.00200 0.00171-1.4 0.0025 1.2 0.129)1.5 0.195 1.2 0.00200 jo 0.00510 0.003090 0.384 0.00200 uitial rate- Slope i roportoniat to order LS rst orde [BJ i' Rrst order

Explanation / Answer

The rate of reaction is first order with respect to A conc and also with respect to B concentration. Hence overall order of reaction is 2nd order.

When the conc of A is doubled keeping conc of B constant then the rate is doubled. Hence order of reaction with respect to A is 1st order.

When conc of B is increased by 1.4 times and then 1.2 times keeping concentration of B constant then rate also increases nearly 1.5 times and 1.2 times respectively. Hence order of the reaction with respect to B is 1st order.

As rate is 1st order wrt to A and 1st order wrt B hence overall rate is 2nd order.

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