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The reaction NO2 + CO → NO + CO2 takes place in two steps. Find the rate law.
2NO2 → NO + NO3 (k1) – slow
NO3 + CO → CO2 + NO2 (k2) – fast
  • a)
    R = k1 [NO2]3
  • b)
    R = k2 [NO3] [CO]
  • c)
    R = k1 [NO2]
  • d)
    R = k1 [NO2]2
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
The reaction NO2 + CO → NO + CO2 takes place in two steps. Find t...
In any reaction the slowest step is the rate determining step, the rate of the overall reaction depends on this step. So, 2NO2 → NO + NO3(k1) is the rate determining step. Therefore the rate law R= k1[NO2]2.
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The reaction NO2 + CO → NO + CO2 takes place in two steps. Find t...
The reaction between NO2 and CO can be represented by the following equation:

2 NO2 + CO -> N2O4 + CO2

In this reaction, two molecules of nitrogen dioxide (NO2) react with one molecule of carbon monoxide (CO) to form one molecule of dinitrogen tetroxide (N2O4) and one molecule of carbon dioxide (CO2).

This reaction is an example of a redox reaction, where the oxidation state of nitrogen changes from +4 in NO2 to +4 in N2O4, and the oxidation state of carbon changes from +2 in CO to +4 in CO2.
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