Question

The following is a multi-step reaction. The rate-limiting step is unimolecular, with A as the sole reactant. A+ BC+ D If [A] and [B] are both 0.135 M, then the rate of reaction is 0.0030 M/s. (a) What is the rate of the reaction if [A] is doubled? Number M s (b) Starting with the original concentrations, what is the rate of the reaction if 1B] is halved? Number M/s (c) Starting with the original concentrations, what is the rate of the reaction if IA) and [B) are both increased by a factor of five? Number M/s

Answer 1

A + B longrightarrow C + D Here A is sole reactant, Reaction lemeliy Step is unimolecular i.e. first order Rte = K[A] Concentration of B has no effect. If [A] is doubled, then rate is doubled Rate = 0.0060 M/sec b There is no effect of change in concentration of B. So, Rate = 0.0030 M/sec c If [A] increased by factor of S, then rate level increase s-filled Rate = S times 0.0030 = 0.015 M/sec