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Rate Determining Step

APCHEM-Y4BDUR

Based on the following proposed mechanism, which of the following steps would be the rate determining step?

$$\text{Step 1: } PCl_5⇔ PCl_4+ Cl$$

$$\text{Step 2: } PCl_4→ PCl_3+ Cl$$

$$\text{Step 3: } Cl + Cl ⇔ Cl_2$$

A

Step 1.

B

Step 2.

C

Step 3.

D

The mechanism does not provide enough information to determine the rate determining step.