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Chapter 19 Acids And Bases
Test Description: Acid and base interactions
Instructions: Answer all questions to get your test result.
1) For a water solution to be acidic, what must be true?
A
none of these.
B
[H3O+] > [OH-]
C
[H3O+] = [OH-]
D
[H3O+] < [OH-]
2) A buffer keeps a solution's pH constant by
A
increasing the concentration of H2O molecules.
B
changing the [H3O+].
C
releasing or absorbing H+ ions
D
providing neutralizing ions.
3) A common example of a good buffer solution is
A
seawater.
B
blood.
C
herb tea.
D
coffee.
4) What determines a buffer's capacity to neutralize added base?
A
all of these are correct.
B
the amount of weak acid
C
its temperature
D
the amount of conjugate base
5) The amount of acid or base that a buffer can neutralizze is called
A
neutralizing capacity
B
buffer concentration.
C
neutralizing concentration.
D
the buffer capacity.
6) If hydronium ions or hydroxide ions are added beyond the buffer capacity, the added excess ions will
A
change the pH.
B
precipitate.
C
have no effect on the pH.
D
neutralize each other.
7) The carbonic acid-bicarbonate buffer sstem in blood has a 1:20 ratio of acid to conjugate base. Thie means it has a great capacity for neutralizing
A
the conjugate acid.
B
excess acid.
C
the conjugate base.
D
excess base.
8) How can you determine the concentration of a water solution of a weak acid?
A
perform an acid-base titration.
B
determine the extent of electrical conductivity.
C
Observet he color change of litmus paper.
D
Measure the pH with a pH meter.
9) To determine the concentration of an unknown acid, one of the requirements is
A
universal pH paper.
B
a standard acid.
C
litmus paper.
D
a standard base
10) To determine the concentration of an unknown acid or base in a titration, you need a(n)
A
a standard salt solution.
B
weak acid solution.
C
acid-base indicator.
D
standard base.
*select an answer for all questions
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