11 Consider the following reaction 3A2B The average rate of

11. Consider the following reaction 3A2B The average rate of appearance of B is given by [Bl/t. How is the average rate of appearance of B related to the average rate of disappearance of A? a) 2[A1/3t b) -21Ay3 c) -3[AV2 12. The kinetics of the reaction below were studied and it was determined that the reaction rate increased by a factor of 9 when the concentration of B was tripled. reaction is order in A+ B> P d) third b) first c) second a) Zero

Solution

11)

Rate of appearance of B = [B] / t

3 * Rate of appearance of B = 2 * rate of disappearance of A

Rate of appearance of B = 2 / 3 * - [A] / t = -2 / 3 * [A] / t

option B is the answer.

12)

Rate = K[A][B]^2

then [B] = tripled then Rate = K[A][3B]^2 = 9* K[A][B]^2

so option C is the answer.