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pH — Quiz Answers

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Based on the definition of logarithms, what is the difference in hydrogen ion concentration between a substance with a pH of 2 and a substance with a pH of 3 ?

A
A substance with a pH of 2 has a 10 times higher concentration of cap h raised to the plus power than a substance with a pH of 3 .
B
A substance with a pH of 3 has a 10 times higher concentration of cap h raised to the plus power than a substance with a pH of 2 .
C
A substance with a pH of 3 has a 100 times higher concentration of cap h raised to the plus power ions than a substance with a pH of 2 .
D
A substance with a pH of 2 has a 100 times higher concentration of cap h raised to the plus power ions than a substance with a pH of 3 .
2
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What is the equilibrium constant of pure water at 25 times degree C ?

A
10 to the 7th power
B
10 to the negative 14 power
C
10 to the negative 7 power
D
10 to the 14th power
3

Which statement about the self-ionization of water is correct?

A
Two water molecules interact to form two hydroxide ions.
B
Two water molecules interact to form a water molecule and a hydroxide ion.
C
Two water molecules interact to form a hydronium ion and a hydroxide ion.
D
Two water molecules interact to form two hydronium ions.
4

Which of these correctly defines the pH of a solution?

A
the log of the hydroxide ion concentration
B
the log of the hydronium ion concentration
C
the negative log of the hydroxide ion concentration
D
the negative log of the hydronium ion concentration
5

A solution containing HCl would likely have

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

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