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Chapter 19 Acids And Bases
Test Description: Acid and base interaction
Instructions: Answer all questions to get your test result.
1) Pure water contains which of the following species?
A
all of these
B
H2O molecules
C
H3O+ ions
D
OH- ions
2) What is true of the concentration of hydronium ions and hydroxide ions in pure water?
A
They are the same.
B
They are extremely small but still significant.
C
They are about equal to the concentrtion of water molecules.
D
more than one of these answers apply.
3) The ion-product constant for pure water is
A
equal to Keq
B
1.0 x 10e-7
C
equal to the product of the hydroxide and hydronium ion concentrations.
D
different from that of watr solutions
4) For basic solution, the concentration of hydroxide ions, OH-, is
A
equal to they hydronium ion concentration.
B
zero
C
greater than 1 x 10e-7
D
1 x 10e-7
5) The definition of pH is
A
log[OH-]
B
the percent of hydronium ions.
C
the parts per million of hydronium ions.
D
-log[H3O+].
6) If the pH of a solution changes from 10 to 11
A
hydroxide ions increase by a factor of 10
B
hydronium ions increase by a factor of 10.
C
hydroxide ions double.
D
hydronium ions decrease by 1/2.
7) Two common ways to measure pH are
A
by taste and by color.
B
with indicators and with a pH meter.
C
by electric conductivity and by temperature.
D
with indicators and a thermometer.
8) If litmus paper turns blue, the pH of the solution must be
A
less than 4.0
B
above 7.0.
C
less than 7.0.
D
acidic.
9) The higher the pH of a solution,
A
all of the above.
B
the more acidic it is.
C
the less basic it is.
D
the greater the concentration of OH- ions.
10) Which of the following 1.0 M solutions has the highest pH?
A
H2SO4
B
HCl
C
NaCl
D
H3PO4
*select an answer for all questions
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