Chemistry

Suppose a compound is involved in three
different reactions denoted R1, R2, and R3.
Tripling the concentration of this reactant in
all three reactions causes the rates of reaction
to increase by factors of 3, 9, and 1, respec-
tively. What is the order of each reaction with
respect to this reactant?
>>> I'm trying to make a guess because I don't understand. My guess is 1, 2, 0.

asked by Mitch
  1. I think you are correct. For the first one,
    R1 = k(A)x but we can ignore k since it will be a constant.
    logR1 = x*log(A)
    If A is tripled, then R1 is 3R1
    log 3 = x*log 3
    0.477 = x*0.477 and
    x = 1 so that is first order.

    If A is tripled, then R1 = 9R1
    log 9 = x*log 9
    0.954 = x*0.477
    x = 0.954/0.477 = 2 or second order.

    If A is tripled, then R1 = 1*R1
    log 1 = x*log3
    0 = x*0.477
    x = 0/0.477 = 0 = zero order.

    posted by DrBob222

Respond to this Question

First Name

Your Answer

Similar Questions

  1. Chemistry

    Just a few questions about rates of reaction. A) Why are the units for average and instantaneous rates the same? -because they are both measures of how quickly a reaction is occuring per unit time B) For a given set of data, two
  2. chemistry

    A student performed two side-by-side reactions to test the decomposition of N2O5. The only difference between the two reactions was reactant concentration — reaction 1 started with 2 M N2O5 and reaction 2 started with 1.2 M.
  3. Chemistry

    When chemists compare the rates of reactions carried out under different conditions, they often compare the rates near the beginning of the reactions. What advantage(s) do you see in this practice? Hint: Think of slow reactions. I
  4. Chemistry

    3. Which oxidation-reduction reactions are best balanced by the half-reaction method? A.) covalent reactions *B.)acid-base reactions C.) ionic reactions D.) intermolecular reactions Thank you.
  5. Chemistry

    In certain first order reactions the concentration of the reactant decreases from 0.15 M to 0.11 M in 36 minutes . calculate the time of half reactions
  6. chemistry

    Using the half-reaction method, balance the redox reaction below. Show your work; partial credit will be given. I- + Br2 → IO3- + Br- Write the reduction and oxidation half-reactions. Balance them for atoms. Balance each of
  7. CHEMISTRY

    What type of reactant typify compostion reactions? You need to clarify your question for me. I haven't heard of composition rreactions. Perhaps I know it by another name. In the real world, there is no "typical" reactant in
  8. Chemistry

    If the concentration of a reactant is decreased, will the speed of the reaction increase or decrease? Explain. I understand that if the concentration of a reactant is INCREASED, the frequency of coliision increases, making the
  9. chemistry

    1. Chemical reactions may occur when two different molecules collide. The frequency and energy of the collisions determine how many reactions occur. How would you expect that frequency of collisions in a gas to change if the
  10. Chemistry

    Explain why each of the following is incorrect: (a) Entropy increases in all spontaneous reactions. Wouldn't (a) be actually correct? Because when there's a spontaneous reaction, you have less stable molecules and more disorder.

More Similar Questions