Phosgene is formed by the reaction of Cl 2 and CO. The experimental rate law is
Rate = k [CO][Cl2]3/2.
The proposed reaction mechanism is
Cl2(g) ⇌ 2Cl(g) Step 1
Cl(g) + CO(g) ⇌ ClCO(g) Step 2
ClCO(g) + Cl2(g) → Cl2CO(g) + Cl(g) Step 3
For the proposed reaction mechanism to be consistent with the rate law:
a) Step 1 is slow and Steps 2 and 3 are fast
b) Step 3 is fast and steps 1 and 2 are slow
c) Steps 1 and 2 are fast and step 3 is slow
d) Steps 1 and 3 are fast and step 2 is slow
e) Step 1 is fast and steps 2 and 3 are slow
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