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Quiz 4
Tara Malone
Started: October 19, 2008 6:59 PM
Questions: 30
1.
(Points: 4)
What is the H
3
O
+
concentration in 0.45 M HCN(aq)? (
K
a
of HCN = 4.0
×
10
10
)
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2.
(Points: 4)
A solution is prepared by diluting 0.16 mol HNO
3
with water to a volume of 1.5 L. What is the
pH of this solution?
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3.
(Points: 4)
What is the OH

concentration in 0.51 M CH
3
CO
2

(aq)? (
K
b
of CH
3
CO
2

= 5.6
×
10
10
)
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4.
(Points: 4)
At 25
°
C, what is the H
3
O
+
concentration in 0.044 M NaOH(aq)? (
K
w
= 1.0
×
10
14
)
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5.
(Points: 4)
What is the pH of 0.015 M aqueous benzoic acid? (
K
a
of C
5
H
6
CO
2
H = 6.3
×
10
5
)
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6.
(Points: 4)
What is the pH of 9.2
×
10
3
M aqueous cyanide ion? (
K
b
of CN

= 2.5
×
10
5
)
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7.
(Points: 4)
Acids that ionize extensively in solution are referred to as
a.
dissociators.
b.
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This note was uploaded on 11/16/2008 for the course CHM 152 taught by Professor Thomas during the Fall '08 term at Pima CC.
 Fall '08
 Thomas
 Chemistry

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