Chemical Kinetics HL

1.The reaction between NO2 and F2 gives the following rate data at a certain temperature. What is the order of reaction with respect to NO2 and F2?





2. Which step in a multi-step reaction is the rate determining step?





3. The rate expression for a reaction is shown below. rate = k[A]2[B]2 Which statements are correct for this reaction? I. The reaction is second order with respect to both A and B. II. The overall order of the reaction is 4. III.    Doubling the concentration of A would have the same effect on the rate of reaction as doubling the concentration of B.





4. Values of a rate constant, k, and absolute temperature, T, can be used to determine the activation energy of a reaction by a graphical method. Which graph produces a straight line?  





5. The rate expression for a particular reaction is Rate = k[P][Q] Which of the units below is a possible unit for k?





6. The reaction 2X(g) + Y(g) → 3Z(g) has the rate expression rate = k [X]2[Y]0 The concentration of X is increased by a factor of three and the concentration of Y is increased by a factor of two. By what factor will the reaction rate increase?





7. A reaction occurs in four steps. The steps and their rates are shown in the table Which is the rate-determining step?





8. The rate expression for a reaction is rate = k[CH3Br][OH–] Which is a possible unit for k?





9. What happens to the rate constant (k) and activation energy (Ea) of a reaction when the temperature is increased?





10. The mechanism of a reaction is XY2 + XY2 → X2Y4 X2Y4 → X2 + 2Y2 X2 + Y2 → 2XY What is the overall equation for the reaction?





11. Consider the reaction 2I−(aq) + H2O2(aq) + 2H+(aq) → I2(aq) + 2H2O(l) In the presence of S2O32–(aq) and starch solution, the time taken for a blue colour to form was observed at various reactant concentrations. What is the correct order with respect to I– and H2O2?





12. Which statement is correct about the rate expression for a chemical reaction?





13. For the reaction 2NO2(g) + F2(g) → 2NO2F(g) the accepted mechanism is NO2(g) + F2(g) → NO2F(g) + F(g)    slow NO2(g) + F(g) → NO2F(g)    fast What is the rate expression for this reaction?





14. The activation energy, of a reaction can be obtained from the rate constant, k, and the absolute temperature, T. Which graph of these quantities produces a straight line?  





15. What is the order of reaction with respect to NO2(g) and F2(g) given the following rate data at a certain temperature?







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