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 
Select an Answer
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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.