Chapter 15 Quiz

Chem 20                         D. Oliver

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  1. All hydrogen-halogen acids are strong. 

    2. Your answer:
    True False

  2. Lewis acids donate protons to water forming hydronium ions. 

    3. Your answer:
    True False

  3. Bronstead-Lowrey bases donate hydroxide to water solutions.

    4. Your answer:
    True False

  4. If NH3 acts as an acid, the conjugate base is NH2-.

    5. Your answer:
    True False

  5. NH3 is a base because it has an unbonded pair of electrons on the nitrogen that readily forms bonds with other substances.

    6. Your answer:
    True False

  6. Calculate the pH of a .200M solution of HCl. Enter your answer with the proper number of sig. figs. and rounding. No units.

    7. Your answer:

  7. Calculate the pH of a .200M solution of Ba(OH)2. Enter your answer with the proper number of sig. figs. and rounding. No units.

    8. Your answer:

  8. Consider the reaction: Ca(OH)2 + 2HNO3 ---> Ca(NO3)2 + 2H2O How many milliliters of 8.00N HNO3 will completely react with 10.0 ml of 4.00N Ca(OH)2? Enter your answer with the proper number of sig. figs. and rounding. No units. 

    9. Your answer:

  9. Calculate the pH of a solution made by combining 200mL of .500M HCl and 300mL of .400M NaOH. Enter your answer with the proper number of sig. figs. and rounding. No units. 

    10. Your answer:

  10. For the equation Pb(NO3)2 + 2KCl ---> 2KNO3 + PbCl2 give the IUPAC name for the reason this reaction occurs. Enter your answer in lower case in this form: mercury(II) sulfide.

    11. Your answer:

  11. What is the total ionic equation for the equation in problem 10.

    12. Your answer:
    Pb+2 + 2NO3- + 2K+ + 2Cl- ---> 2KNO3 + Pb+2 + 2Cl-
    Pb+2 + 2NO3- + 2KCl ---> 2K+ + 2NO3- + PbCl2
    Pb+2 + 2NO3- + 2K+ + 2Cl- ---> 2K+ + 2NO3- + PbCl2
    Pb(NO3)2 + 2K+ + 2Cl- ---> 2K+ + 2NO3- + Pb+2 + 2Cl-
    Pb+2 + 2NO3- + 2K+ + 2Cl- ---> 2KNO3 + PbCl2

  12. Magnesium sulfate plus potassium carbonate react. What is the net ionic equation for this reaction.

    13. Your answer:
    Mg+2 + SO4-2 + 2K+ + CO3-2 ---> MgCO3 + 2K+ + SO4-2
    Mg+2 + SO4-2 + K2CO3 ---> MgCO3 + 2K+ + SO4-2
    MgSO4 + K2CO3 ---> MgCO3 + K2SO4
    Mg+2 + SO4-2 + K+ + CO3-2 ---> MgCO3 + K+ + SO4-2
    Mg+2 + CO3-2 ---> MgCO3

  13. Write the net ionic equation for the following reaction:

    14. 2HC2H3O2 + Ba(OH)2 --->Ba(C2H3O2)2 + 2H2O. 
    Your answer:
    HC2H3O2 + OH- ---> C2H3O2- + H2O
    2HC2H3O2 + Ba+2 + 2OH- --->Ba+2 + 2C2H3O2- + 2H2O
    2HC2H3O2 + Ba+2 + 2OH- --->Ba(C2H3O2)2 + 2H2O
    2H+ + 2C2H3O2- + Ba+2 + 2OH- --->Ba(C2H3O2)2 + 2H2O
    2H+ + 2C2H3O2- + Ba+2 + 2OH- --->Ba+2 + 2C2H3O2- + 2H2O

  14. Ammonium hydroxide is a ____________ electrolyte, hydrofluoric acid is a ____________electrolyte and KOH is a ____________ electrolyte.

    15. Your answer:
    strong, weak, weak
    weak, weak, strong
    strong, strong, weak
    weak, strong, weak
    strong, weak, strong

  15. How many grams of NaOH are required to react with 100 ml of 2.5 M HCl? 

    16. Your answer:
    200 grams
    5 grams
    10 grams
    100 grams
    20 grams

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