R. Janssen, MSEC Chemistry 12 Provincial ... R. Janssen, MSEC Chemistry 12 Provincial Workbook (Unit

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  • R. Janssen, MSEC Chemistry 12 Provincial Workbook (Unit 01), P. 1 / 68

    Chemistry 12 Provincial Workbook

    Unit 01: Reaction Kinetics

    Multiple Choice Questions 1. Which of the following describes what happens to the KE and PE as an activated

    complex forms products?

    2. Increasing the concentration of which of the following substances would cause the

    greatest increase in the reaction rate?

    A. 2H

    B. NO

    C. 2N O

    D. 2H O

  • R. Janssen, MSEC Chemistry 12 Provincial Workbook (Unit 01), P. 2 / 68

    3. Which of the following are products in the overall reaction?

    I 2N

    II 2 2N O

    III 2N O

    IV 2H O

    A. I and II only B. I and IV only C. II and III only D. III and IV only 4. Which factor affects the reaction rate of heterogeneous reactions, but not of

    homogeneous reactions? A. catalyst B. temperature C. surface area D. concentration 5. Consider the following reaction...

    3 3 3 2 2CH COOH(aq)+NaHCO (s) NaCH COO(aq)+CO (g)+H O(l)

    Which of the following properties could best be used to measure the reaction rate?

    A. the volume of 2CO

    B. the volume of 2H O

    C. the mass of 3CH COOH

    D. the surface area of 3NaHCO

  • R. Janssen, MSEC Chemistry 12 Provincial Workbook (Unit 01), P. 3 / 68

    6. Consider the following reaction...

    2 32Al(s)+3CuCl (aq) 3Cu(s)+2AlCl (aq)

    If 0.56 g Cu is produced in 1.0 minute, what mass of Al is used up in 20.0 seconds?

    A. 0.053 g B. 0.12 g C. 0.16 g D. 0.37 g 7. The average kinetic energy of colliding particles can be increased by… A. adding a catalyst B. increasing pressure C. increasing temperature D. increasing reactant concentration 8. A substance that increases the rate of a chemical reaction and may be recovered

    unchanged at the end of the reaction is a(n)… A. product B. catalyst C. activated complex D. reaction intermediate

  • R. Janssen, MSEC Chemistry 12 Provincial Workbook (Unit 01), P. 4 / 68

    9. Consider the following PE diagram for a reversible reaction…

    10. Consider the following reaction…

    2 2 2 22H O (l) 2H O(l) O (g) 

    Which graph shows the relationship between rate of consumption of 2 2H O and time?

  • R. Janssen, MSEC Chemistry 12 Provincial Workbook (Unit 01), P. 5 / 68

    11. Consider the following reaction…

    2 2Mg(s) 2HCl(aq) H (g) MgCl (aq)  

    The rate of this reaction increases when more magnesium is added. This change is caused by the…

    A. addition of a catalyst B. increase in surface area C. change in nature of the reactants D. increase in concentration of reactants 12. Consider the following PE diagram…

  • R. Janssen, MSEC Chemistry 12 Provincial Workbook (Unit 01), P. 6 / 68

    13. Which graph shows the relationship between activation energy and temperature?

    14. A catalyst changes the rate of a reaction by…

    A. changing H B. increasing the temperature C. decreasing the energy of the products D. providing an alternate reaction mechanism 15. At room temperature, which of the following reactions is fastest?

    A. 2 2 22H (g) O (g) 2H O(g) 

    B. 2 2Pb (aq) 2I (aq) PbI (s)   

    C. 2 2 34Fe(s) 3O (g) 2Fe O (s) 

    D. 2Cu(s) 2Ag (aq) Cu (aq) 2Ag(s)   

    16. Consider the following reaction…

    4 2 2 2CH (g) 2O (g) CO (g) 2H O(g)  

    At a certain temperature, 1.0 mol 4CH is consumed in 4.0 minutes. The rate of production of

    2H O is…

    A. 0.25mol/min

    B. 0.50mol/min

    C. 2.0mol/min

    D. 8.0mol/min

  • R. Janssen, MSEC Chemistry 12 Provincial Workbook (Unit 01), P. 7 / 68

    17. The changes in PE and KE, as reactant molecules approach each other, can be represented by…

    18. Consider the following PE diagram…

    Which of the following describes this reaction?

  • R. Janssen, MSEC Chemistry 12 Provincial Workbook (Unit 01), P. 8 / 68

    19. A chemical reaction that gives off energy is…

    A. exothermic and H is positive

    B. exothermic and H is negative

    C. endothermic and H is positive

    D. endothermic and H is negative 20. Consider the following reaction involving 10. g of powdered zinc…

    2 2Zn(s) 2HCl(aq) ZnCl (aq) H (g)  

    The rates, in order of fastest to slowest, are… A. 1, 2, 3 B. 2, 1, 3 C. 3, 1, 2 D. 3, 2, 1 21. Activation energy can be described as the… A. energy of motion B. energy of the activated complex C. energy difference between the reactants and the products D. energy difference between the reactants and the activated complex

  • R. Janssen, MSEC Chemistry 12 Provincial Workbook (Unit 01), P. 9 / 68

    22. Consider the following potential energy diagram for a reversible reaction…

    Which of the following describes the system above?

    23. Increasing the temperature of a reaction increases the reaction rate by (1) increasing

    frequency of collisions, (2) increasing the kinetic energy of collision, and/or (3) decreasing the potential energy of collision…

    A. I only B. I and II only C. II and III only D. I, II and III 24. What effect does a catalyst have on a reaction?

    A. It changes the H of a reaction B. It increases the kinetic energy of the reactants C. It decreases the potential energy of the products D. It provides a reaction mechanism with a lower activation energy

  • R. Janssen, MSEC Chemistry 12 Provincial Workbook (Unit 01), P. 10 / 68

    25. Consider the graph for the following reaction…

    3 2 2 2CaCO (s) 2HCl(aq) CaCl (aq) CO (g) H O(l)   

    The average rate of reaction is greatest in the time interval… A. 0 - 1 minute B. 0 - 2 minutes C. 0 - 3 minutes D. 0 - 4 minutes 26. Which of the following changes will increase the average kinetic energy of reactant

    molecules? A. adding a catalyst B. increasing the temperature C. increasing the surface area D. increasing the concentration

  • R. Janssen, MSEC Chemistry 12 Provincial Workbook (Unit 01), P. 11 / 68

    27. Consider the following potential energy diagram…

    Which of the following represents the heat of reaction, H, for the forward reaction? A. I B. II C. III D. IV 28. When a catalyst is added to a reaction (1) the heat of reaction increases, (2) a new

    mechanism is provided, and/or (3) the equilibrium constant increases… A. II only B. I and II only C. II and III only D. I, II and III 29. Consider the following mechanism for a reaction…

    Step 01 2HBr O HOOBr 

    Step 02 HBr HOOBr 2HOBr 

    Step 03 2 22HBr 2HOBr 2H O 2Br  

    Which of the following statements is correct?

    A. 2Br is a reactant

    B. HBr is a product C. HOBr is a catalyst

    D. HOOBr is a reaction intermediate

  • R. Janssen, MSEC Chemistry 12 Provincial Workbook (Unit 01), P. 12 / 68

    30. Which of the following reactions will be slowest at 25°C? A. Cu(s) S(s) CuS(s) 

    B. 2H (aq) OH (aq) H O(l)   

    C. 2 2Pb (aq) 2Cl (aq) PbCl (s)   

    D. 22NaOCl(aq) 2NaCl(aq) O (g) 

    31. Which of the following could be used as the units for rate of a reaction?

    I. mL/sec

    II. g/min

    III. M/min

    A. I only B. I and II only C. II and III only D. I, II and III 32. Consider the following reaction…

    2 2Zn(s) 2HCl(aq) ZnCl (aq) H (g)  

    A graph of concentration of HCl vs time could be represented by…

  • R. Janssen, MSEC Chemistry 12 Provincial Workbook (Unit 01), P. 13 / 68

    33. Consider the following experiments, each involving equal masses of zinc and 10.0 mL of acid…

    The rate of reaction in order from fastest to slowest is… A. I > II > III B. II > I > III C. III > I > II D. III > II > I 34. What happens to the energy of reactant molecules as they approach one another?

  • R. Janssen, MSEC Chemistry 12 Provincial Workbook (Unit 01), P. 14 / 68

    35. Consider the following reaction mechanism:

    Step 01 2ClO H O HClO OH    

    Step 02 I HClO HIO Cl   

    Step 03 2HIO OH IO H O    

    The catalyst is…

    A. IO

    B. 2H O

    C. ClO

    D. ClOH

    36. Consider the following reaction…

    2 2 3N (g) 3H (g) 2NH (g) 

    If the rate of formation of NH3 is 4.0 x 10-4 mol/s, then the rate of consumption of 2H is…

    A. 42.0x10 mol/sec

    B. 44.0x10 mol/sec

    C. 46.0x10 mol/sec

    D. 31.2x10 mol/sec

    37. Consider the following reaction…

    2 2Zn(s) 2HCl(aq) ZnCl (aq) H (g)  

    Which of the following instruments could be used to monitor the rate of the reaction in an open system?

    I. Balance

    II. Pressure gauge

    III.