AnswersCrowley Original Credit Chemistry BArrhenius, Bronsted-Lowry, and Lewis Acids and Bases

pH Answers

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1
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Which would most likely be the pH of a highly-corrosive acid?

A
1
B
5
C
8
D
11
2
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Which statement about the self-ionization of water is correct?

A
Two water molecules interact to form a water molecule and a hydroxide ion.
B
Two water molecules interact to form a hydronium ion and a hydroxide ion.
C
Two water molecules interact to form two hydronium ions.
D
Two water molecules interact to form two hydroxide ions.
3

The pOH of a solution is 10.75. What is the concentration of OH– ions in the solution?Use .

Question illustration
A
3.162 10–108 M
Option A
B
1.778 10–11 M
Option B
C
1.075 102 M
Option C
D
5.623 1010 M
Option D
4

Which describes an alkaline solution?

A
pH less than 7
B
pH equal to 7
C
basic
D
acidic
5

A solution containing HCl would likely have

A
a high pH and a low pOH.
B
a low pH and a high pOH.
C
a high pH and a high pOH.
D
a low pH and a low pOH.
6

The pH of a solution is 2.0. Which statement is correct?Useful formulas include , , , and .

Question illustration
A
The pOH of the solution is 12.0.
B
The concentration of OH– ions is 1.0 10–2 M.
Option B
C
The concentration of ions is 100.0 M.
Option C
D
The pOH of the solution is 16.0.
7

Note the pH and pOH values labeled with letters on the pH scale below.Based on log rules and the way pH is calculated, what is the difference in [OH– ] concentration between point A and point B.

Question illustration
A
101
B
105
C
106
D
107
8

Which statement best describes the pH of pure water?

A
It is neutral because the concentration of hydronium ions equals that of hydroxide ions.
B
It is neutral because the pure liquid contains neither hydronium ions nor hydroxide ions.
C
It is acidic because it has a hydronium ion concentration of .
Option C
D
It is basic because it has a hydroxide ion concentration of .
Option D
9

Which of these correctly defines the pH of a solution?

A
the negative log of the hydronium ion concentration
B
the log of the hydronium ion concentration
C
the negative log of the hydroxide ion concentration
D
the log of the hydroxide ion concentration
10

What is the pH of a solution with [H+] = 1.25 10–10 M?Use .

Question illustration
A
–10.1
B
–9.90
C
7.90
D
9.90

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