The set of lettered choices below refers to multiple questions. Select the one lettered choice that best fits each statement or answers each question. A choice may be used once, more than once, or not at all in each set.
Reacts with an equal volume of to form a solution with
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To answer this question, you need to know that acids react with bases to form salts and water. Since the question refers to equal volumes of each solution, assume liter of each solution is available. Barium hydroxide solution is a strong base (i.e., it is completely ionized in water) and
liter of
provides
mole of
ions in solution. When
liter of this solution is added to
liter of either
,
or
, no reactions occur and the resulting solutions remain basic; that is, the
will be greater than
in each case. When
mole of
mole of acetic acid, the resulting solution will also be basic and have a
greater than
because acetic acid is a weak acid (i.e., it is incompletely ionized in water). The acetic acid reacts with the
The acetate ion produced is a strong base, which hydrolyzes in water to yield a solution containing more liter of
reacts with
liter of
, there is a reaction between
mole of
mole of
mole of
. The resulting solution contains
is
; therefore choice (A) is the correct answer.