posted by .

A chemist does a reaction rate analysis on the following reaction:

2CO (g) + O2 (g) → 2CO2 (g)

She collects the following data:

Trial Initial Concentration of

CO (M) Initial Concentration

of O2 (M) Instantaneous

Reaction Rate (M/s)

1 0.150 0.150 0.113

2 0.300 0.150 0.226

3 0.300 0.300 0.904

What is the rate equation for this reaction?

  • Chemistry -

    The rate equation is rate = k(CO)^x(O2)^y.
    Divide rate 2 by rate 1.
    0.226/0.113 = 2 and
    2 = (0.300)x(0.150)y/(0.150)x(0.150)y

    Note that 0.150y cancels with 0.150y and leaves just
    2= (2)x and x must be 1.
    Do the same thing for rate 3 divided by rate 2 and determine y. You should get 2. Then substitute x = 1 and y = 2 into any of the three rate equations to determine k, then write the equation. If you get stuck, post your work in a new post at the top of the page (this post is close to the bottom when I read it) and I can help you through it.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    1) The activation energy of a certain reaction is 35.3 kJ/mol. At 20 degrees C, the rate constant is 0.0130 s^-1. At what temperature would this reaction go twice as fast?
  2. Chemistry

    Okay, this is a question in several parts that really stumps me: Given the following reaction determine the rate of expression (CH3)3CBr + OH -----> (CH3)3COH + r [(CH3)3CBr] OH Initial reaction rate (mol L-1 sec-1) .10 .10 1.0 …
  3. chem

    Butadiene can undergo the following reaction To form a dimer(two butadiene molecules hooked together). 2c4h8---->c8h12. The half life for the reaction at a given temperature is 5.92x10-2 sec. The reaction kinetics are second order. …
  4. Chemistry

    The reaction between NO (nitric oxide) and oxygen is a key step in the formation of acid rain. O2(g) + 2NO(g) → 2NO2(g) A series of experiments were run, each of which starts with a different set of reactant concentrations. From …
  5. Chemistry

    In a given 1st order reaction A ---> products, the initial concentration of A is 0.40 M. What will be the concentration of A after 15 seconds if the half-life of the reaction is 3 seconds?
  6. chemistry

    The decomposition of N2O5 proceeds according to the following equation 2 N2O5(g) → 4 NO2(g) + O2(g). The rate constant, k, for the reaction at 298 K is 2.20 x 10-3 min-1. If a reaction is set up in a vessel at 298 K, with an …
  7. Chemistry

    For the following reaction 2NO2 -> 2NO +O2 is second order reaction. If the initial concentration of NO2 is 0.098M and the initial rate of disappearance is 2.72e-3 M/sec , what is the value of the rate constant?
  8. Chemistry

    The decomposition reaction of A to B has a rate constant of 0.00923 M-1s-1: A → 2B If the initial concentration of A is 0.160 M, how long will it take for the concentration of A to decrease by 68.2%?
  9. Science work

    A reaction is thought to be second order with respect to the concentration of carbon monoxide. What evidence would support this?
  10. Chemistry

    The reaction of nitrogen dioxide with fluorine generates nitryl fluoride: 2NO2(g) + F2(g) --> 2NO2F(g) To determine the rate law for this reaction, a chemist performed several initial-rate experiments using different initial concentration, …

More Similar Questions