Topic
Q:
The concentration of \( \mathrm{H}^{+} \)in a solution is \( 1 \times 10^{-2} \mathrm{M} \). What is the hydroxide ion concentration?
\( 1 \times 10^{-7} \mathrm{M} \)
\( 1 \times 10^{-10} \mathrm{M} \)
\( 1 \times 10^{-16} \mathrm{M} \)
\( 1 \times 10^{-12} \mathrm{M} \)
Q:
Nitrous acid, \( \mathrm{HNO}_{2} \), is a weak acid. What is the reaction of nitrous acid in water?
\( \mathrm{HNO}_{2}(a q)+\mathrm{OH}^{-}(a q) \rightarrow \mathrm{H}_{2} \mathrm{O}(l)+\mathrm{NO}_{2}^{-}(a q) \)
\( \mathrm{HNO}_{2}(a q)+\mathrm{H}_{3} \mathrm{O}^{+}(a q) \rightleftharpoons \mathrm{H}_{2} \mathrm{O}(l)+\mathrm{H}_{2} \mathrm{NO}_{2}^{+}(a q) \)
\( \mathrm{HNO}_{2}(a q)+\mathrm{H}_{2} \mathrm{O}(l) \rightarrow \mathrm{H}_{3} \mathrm{O}^{+}(a q)+\mathrm{NO}_{2}^{-}(a q) \)
\( \mathrm{HNO}_{2}(a q)+\mathrm{H}_{2} \mathrm{O}(l) \rightleftharpoons \mathrm{H}_{3} \mathrm{O}^{+}(a q)+\mathrm{NO}_{2}^{-}(a q) \)
Q:
\( H _ { 3 } PO _ { 4 } + KOH \rightarrow K _ { 3 } PO _ { 4 } + H _ { 2 } O \)
Q:
What are the products for the reaction of nitric acid with water?
\( \mathrm{H}_{2} \mathrm{O}(a q)+\mathrm{NO}_{3}^{-}(a q) \)
\( \mathrm{H}_{3} \mathrm{O}(a q)+\mathrm{NO}_{3}(a q) \)
\( \mathrm{H}_{2}(g)+\mathrm{NO}_{2}(a q) \)
\( \mathrm{H}_{3} \mathrm{O}^{+}(a q)+\mathrm{NO}_{3}^{-}(a q) \)
Q:
A 25.0 mL sample of \( \mathrm{HNO}_{3} \) was neutralized by 29.2 mL of \( 0.74 \mathrm{M} \mathrm{Ca}(\mathrm{OH})_{2} \). What was the
concentration of \( \mathrm{HNO}_{3} \) ?
0.86 M
0.43 M
1.7 M
0.0017 M
Q:
What are the products for the reaction of magnesium hydroxide with water?
\( \mathrm{Mg}^{2+}(a q)+2 \mathrm{OH}^{-}(a q) \)
\( \mathrm{H}_{2}(g)+\mathrm{MgO}(s)+\mathrm{O}_{2}(g) \)
\( \mathrm{Mg}(s)+\mathrm{OH}(a q) \)
\( \mathrm{Mg}^{2+}(a q)+\mathrm{OH}_{2}^{-}(a q) \)
Q:
What is the acid that produces the conjugate base \( \mathrm{HSO}_{4}^{-} \)?
\( \mathrm{SO}_{4}^{2-} \)
\( \mathrm{H}_{2} \mathrm{SO}_{3}^{+} \)
\( \mathrm{SO}_{3}^{2-} \)
\( \mathrm{H}_{2} \mathrm{SO}_{4} \)
Q:
Which of the following is a correct reaction for an Arrhenius base in water?
\( \mathrm{KOH}(s) \rightarrow 2 \mathrm{KH}(s)+\mathrm{O}_{2}(g) \)
\( \mathrm{Ca}(\mathrm{OH})_{2}(s) \rightarrow 2 \mathrm{Ca}^{2+}(a q)+\mathrm{OH}^{-}(a q) \)
\( \mathrm{NaOH}(s) \rightarrow \mathrm{Na}^{+}(a q)+\mathrm{OH}^{-}(a q) \)
\( \mathrm{HNO}_{3}(a q) \rightarrow \mathrm{H}^{+}(a q)+\mathrm{NO}_{3}^{-}(a q) \)
Q:
A prepared buffer solution contains a mixture of \( \mathrm{H}_{2} \mathrm{PO}_{4}^{-} \)and \( \mathrm{HPO}_{4}^{2-} \) ions. Which species will react with
any \( \mathrm{H}^{+} \)ions added to the solution?
\( \mathrm{HPO}_{4}^{2-} \)
\( \mathrm{H}_{2} \mathrm{PO}_{4}^{-} \)
\( \mathrm{OH}^{-} \)
\( \mathrm{H}_{3} \mathrm{O}^{+} \)
Q:
A solution has an \( \left[\mathrm{H}^{+}\right] \)of \( 1 \times 10^{-6} \mathrm{M} \). What is the \( \left[\mathrm{OH}^{-}\right] \)?
\( 1 \times 10^{-2} \mathrm{M} \)
\( 1 \times 10^{-20} \mathrm{M} \)
\( 1 \times 10^{-8} \)
\( 1 \times 10^{-1} \mathrm{M} \)
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