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Multiple Choice
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1

What substance is acting as the Bronsted/Lowry base when barium hydroxide is dissolved in water to produce Ba2+ and OH-?
A)Ba2+
B)OH-
C)H2O
D)Ba(OH)2
E)H3O+
2

Which of the following reagents is not a strong electrolyte:
A)NH4Cl
B)NaCl
C)HCl
D)HC2H3O2
E)NaC2H3O2
3

Which is not a characteristic property of bases?
A)Tastes bitter
B)Turn litmus from pink to blue
C)Neutralize acids
D)React with carbonates to produce carbon dioxide gas
E)Feel slippery
4

What is the H+ concentration in a 5.70 x 10-3 M NaOH solution?
A)5.7 x 10-17 M
B)8.77 x 10-11 M
C)3.08 x 10-10 M
D)8.77 x 10-13 M
E)1.75 x 10-12 M
5

The hydronium ion concentration in pure water is:
A)1.0 x 10-14 M
B)1.0 x 10-7 M
C)1.0 x 107 M
D)equal to the hydroxide concentration
E)B and D
6

What is the [H+] in a solution with a pH of 2.8?
A)[6.3 x 102]
B)[1.6 x 10-3]
C)[6.3 x 10-2]
D)[4.8 x 10-8]
E)[5.0 x 10-7]
7

What is the pH of 15 mL of 0.0045 M HNO3?
A)4.17
B)2.35
C)3.35
D)5.35
E)10.0
8

Express [H+] = 3.4 x 10-9 in terms of pH.
A)3.40
B)8.47
C)9.53
D)-0.53
E)none of the above
9

Which of the following substances when dissolved in water will form an acid aqueous solution?
A)KI
B)Ba(OH)2
C)CH3COONa
D)NH4Cl
E)NaF
10

Hard water deposits (calcium carbonate) have built up around your bathroom sink. Which one of the following would be best to dissolve the deposit?
A)ammonia
B)vinegar
C)bleach
D)lye
11

Proton transfer is the essential feature of the Bronsted-Lowery acid-base concept. The figure below illustrates an acid-base reaction between ammonia and water. In this reaction:

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A)Water serves as a base with the ammonium ion serving as its conjugate acid.
B)Ammonia serves as a base with the ammonium ion serving as its conjugate acid.
C)Ammonia serves as a base with the hydroxide ion serving as its conjugate acid.
D)Ammonia serves as an acid with the ammonium ion serving as its conjugate base.
E)Water serves as an acid with the ammonium ion serving as its conjugate base.
12

Calculate the pH of a buffer containing 0.10 M acetic acid and 0.15 M sodium acetate. (Ka = 1.8 x 10-5)
A)3.57
B)4.74
C)4.92
D)7.15
E)9.26





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