Rate law for the reaction

Question

2A + B + 3C --> 2D + E

order of the reaction respect to A,B,C?

Overall order of the reaction

If C is halved how will the rate change?

If B is quadrupled, how will the rate change?

Answer 1

Unless this is an elementary step in the mechanism, we cannot determine the rate law or the order with respect to the individual species. So, since no other information (data) is provided, we'll assume this is an elementary (rate-limiting) step.

Order with respect to A is 2nd order

Order with respect to B is 1st order

Order with respect to C is 3rd order

Overall order is 6th order

Rate = k[A]²[B][C]³ ... rate law

If C is halved, the rate will be reduced by 87.5% or will be 12.5% the rate of original reaction

If B is quadrupled, the rate will be increased by 16 times.