AP Chemistry: ChAPter 16 Quiz

10 Questions  I  By Ms.thur
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 AP chemistry: chAPter 16 quiz
This a a multiple choice quiz covering material from Chapter 16 in Chemistry, The Central Science for AP Chemistry.

  
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  • 1. 
    What is the conjugate acid of NH3?
    • A. 

      NH4+

    • B. 

      NH3+

    • C. 

      NH2+

    • D. 

      NH3

    • E. 

      NH4OH


  • 2. 
    Which one of the following is the weakest acid?
    • A. 

      HClO (Ka = 3.0 x 10-8)

    • B. 

      HCN (Ka = 4.9 x 10-10)

    • C. 

      Acetic Acid (Ka = 1.8 x 10-5)

    • D. 

      HNO2 (Ka = 4.5 x 10-4)

    • E. 

      HF (Ka = 6.8 x 10-4)


  • 3. 
    Which one of the following is a Bronsted-Lowry acid?
    • A. 

      HNO2

    • B. 

      (CH3)3NH+

    • C. 

      HF

    • D. 

      CH3COOH

    • E. 

      All of the above


  • 4. 

    In the reaction below, NH3 is acting as a(n) ______________ base, but not as a(n) ________ base.
    • A. 

      Arrhenius, Lewis

    • B. 

      Arrhenius, Bronsted-Lowry

    • C. 

      Lewis, Arrhenius

    • D. 

      Bronsted-Lowry, Lewis

    • E. 

      Lewis, Bronsted-Lowry


  • 5. 
    What is the conjugate base of OH-?
    • A. 

      O-2

    • B. 

      H2O

    • C. 

      O-

    • D. 

      O2

    • E. 

      H3O+


  • 6. 
    A- is a weak base.  Which equilbrium corresponds to the equilibrium constant Ka for HA?
    • A. 

      A- + H3O+ <--> HA + H2O

    • B. 

      A- + OH- <--> HOA-2

    • C. 

      A- + H2O <--> HA + OH-

    • D. 

      HA + H2O <--> H2A+ + A-

    • E. 

      HA + H2O <--> H3O+ + A-


  • 7. 
    What is the pH of an aqueous solution at 25C in which [H+] is 0.0025 M?
    • A. 

      2.60

    • B. 

      2.25

    • C. 

      -3.40

    • D. 

      3.40

    • E. 

      -2.60


  • 8. 
    Calculate the molarity of hydroxide ion in an aqueous solution that has a pOH of 5.33.
    • A. 

      8.67

    • B. 

      2.1 x 10-9

    • C. 

      5.3 x 10-14

    • D. 

      8.7 x 10-14

    • E. 

      4.7 x 10-6


  • 9. 
    The base dissociation constant of ethylamine (C2H5NH2) is 6.4 x 10-4. What is the [H+] in a 1.6x10-12 M solution of ethylamine?
    • A. 

      3.5 x 10-12

    • B. 

      11.46

    • C. 

      2.9 x 10-3

    • D. 

      3.2 x 10-3

    • E. 

      3.1 x 10-12


  • 10. 
    The pH of a 0.15 M aqueous solution of NaZ (the sodium salt of HZ) is 10.7.  What is the Ka for HZ?
    • A. 

      3.3 x 10-8

    • B. 

      1.6 x 10-6

    • C. 

      6.0 x 10-9

    • D. 

      1.3 x 10-12

    • E. 

      8.9 x 10-4


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