A.P. Chemistry Quiz: Buffer Solutions (Ch. 15)
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) The pH of a solution that contains 0.818 M acetic acid (Ka = 1.76 x 10-5) and 0.172 M sodium acetate is
__________. The Ka of acetic acid is 1.76 ˛ 10-5.
A) 9.922
B) 5.432
C) 4.077
D) 8.568
E) 8.370
2) Of the following solutions, which has the greatest buffering capacity?
A) 0.121 M HF and 0.667 M NaF
B) 0.821 M HF and 0.909 M NaF
C) 0.821 M HF and 0.217 M NaF
D) 0.100 M HF and 0.217 M NaF
E) They are all buffer solutions and would all have the same capacity.
3) Calculate the pH of a solution prepared by dissolving 0.37 mol of formic acid (HCO2H) and 0.23 mol of sodium
formate (NaCO2H) in water sufficient to yield 1.00 L of solution. The Ka of formic acid is 1.8 x 10-4.
A) 2.30
B) 10.46
C) 2.09
D) 3.95
E) 3.54
4) The addition of hydrofluoric acid and __________ to water produces a buffer solution.
A) HCl
B) NaNO3
C) NaCl
D) NaBr
5) Which of the following could be added to a solution of sodium acetate to produce a buffer?
acetic acid
hydrochloric acid
potassium acetate
A) hydrochloric acid only
B) sodium chloride or potassium acetate
C) acetic acid only
D) acetic acid or hydrochloric acid
E) potassium acetate only
A-1
sodium chloride
E) NaF
Answer Key
Testname: QUIZ_BUFFERS_CH_15.TST
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) C
ID: chem9b 17.1-1
2) B
ID: chem9b 17.1-8
3) E
ID: chem9b 17.1-11
4) E
ID: chem9b 17.1-16
5) D
ID: chem9b 17.1-17
A-1