College Chemistry Ii Phs 1035 Practice Exam 3 With Answer Key Page 9
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3942) Of the compounds below, a 0.1 M aqueous solution of ________ will have the highest pH.
42)
A) KCN, K a of HCN = 4.0 × 10 -10
B) NH 4 NO 3 , K b of NH 3 = 1.8 × 10 -5
C) NaOAc, K a of HOAc = 1.8 × 10 -5
D) NaClO, K a of HClO = 3.2 × 10 -8
E) NaHS, K b of HS - = 1.8 × 10 -7
43) A 0.1 M solution of ________ has a pH of 7.0.
43)
A) Na 2 S
B) KF
C) NaNO 3
D) NH 4 Cl
E) NaF
44) Which of the following acids will be the strongest?
44)
B) HSO 4 -
E) HSO 3 -
A) H 2 SO 4
C) H 2 SO 3
D) H 2 SeO 4
45) Of the following, which is the strongest acid?
45)
A) HClO
B) HClO 3
C) HClO 2
D) HClO 4
E) HIO
46) In the gas phase reaction below, NH 3 is acting as a(n) ________ base but not as a(n) ________ base.
46)
A) Arrhenius, Br nsted-Lowry
B) Br nsted-Lowry, Lewis
C) Lewis, Arrhenius
D) Lewis, Br nsted-Lowry
E) Arrhenius, Lewis
47) The pH of a 0.55 M aqueous solution of hypobromous acid, HBrO, at 25.0 °C is 4.48. What is the
47)
value of K a for HBrO?
E) 3.0 × 10 4
A) 2.0 × 10 -9
B) 1.1 × 10 -9
C) 6.0 × 10 -5
D) 3.3 × 10 -5
48) What is the conjugate acid of NH 3 ?
48)
B) NH 2 +
C) NH 3 +
D) NH 4 +
A) NH 3
E) NH 4 OH
49) What is the conjugate acid of CO 3 2- ?
49)
A) CO 2 2-
B) HCO 2 2-
C) H 2 CO 3
D) HCO 3 -
E) none of the above
50) The conjugate base of HSO 4 - is ________.
50)
C) SO 4 2-
A) OH -
D) HSO 4 +
E) H 3 SO 4 +
B) H 2 SO 4
9
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