A possible mechanism for the overall reaction
Br2 (g) + 2NO (g) -> 2NOBr (g)
is
NO (g) +Br2 (g) (equilibrium arrows: on top it says k1 and on bottom k-1) NOBr2 (g) (fast) step 1
NOBr2 (g) + NO (g) ->(on top of arrow k2) 2NOBr (slow) step 2
the question: which of the following the reaction intermediate?
a) Br2
b) NO
c)NOBr2
d)NOBr
c) nobr2
To determine the reaction intermediate in the mechanism provided, we need to identify a species that is produced in one step and utilized in a subsequent step.
In this case, we can see that the species NOBr2 is produced in the first step (Step 1) and then utilized in the second step (Step 2). Therefore, the reaction intermediate in this mechanism is NOBr2.
So, the correct answer is (c) NOBr2.
The reaction intermediate is the species that is formed in one step of the reaction and then consumed in a subsequent step. Looking at the proposed mechanism, we can see that in Step 1, NO reacts with Br2 to form NOBr2, and in Step 2, NOBr2 reacts with NO to form 2NOBr.
Since NOBr2 is formed in Step 1 and consumed in Step 2, it is the reaction intermediate.
So the answer is c) NOBr2.