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chap3q40_55.tex
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chap3q40_55.tex
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\documentclass[fleqn]{exam}
\usepackage{chemfig}
\usepackage{siunitx}
\begin{document}
\begin{questions}
\setcounter{question}{39}
\question Write the EQUILIBRIUM EQUATION for a saturated solution of the following salts AND the corresponding SOLUBILITY PRODUCT EXPRESSIONS.
\begin{parts}
\part \chemfig{BaSO_4}(s)
\vspace{1in}
\part \chemfig{MgF_2}(s)
\vspace{1in}
\part \chemfig{Ag_2S}(s)
\vspace{1in}
\part \chemfig{Cu{(}lO_3{)}_2}(s)
\vspace{1in}
\end{parts}
\question Which of the following salts is the most soluble? Which is the least?
\newline
AgCl ; \chemfig{K_{sp}} = \num{1.8d-10} \newline
Aal ; \chemfig{K_{sp}} = \num{8.5d-17} \newline
AgBr; \chemfig{K_{sp}} = \num{5.4d-13}
\vspace{1in}
\question A solution in equilibrium with a precipitate of \chemfig{FeCO_3} contains \num{5d-6} M \chemfig{Fe^{2+}} and \num{6d-6} M \chemfig{CO^{2-}_3}. Calculate \chemfig{K_{sp}} for \chemfig{FeCO_3}.
\vspace{1in}
\question What is the concentration of \chemfig{Zn^{2+}} ions in a saturated solution made by shaking ZnS(s) with water?
\vspace{1in}
\question How many grams of \chemfig{PbSO_4}(s) Will dissolve in 5.0 L of water?
\vspace{1in}
\setcounter{question}{46}
\question Calculate the molar solubility of \chemfig{Ag_2CrO_4}.
\vspace{1in}
\setcounter{question}{48}
\question Calculate the solubility of \chemfig{Fe{(OH)}_2} in grams per litre.
\vspace{.85in}
\question A solution in equilibrium with a precipitate of \chemfig{Ag_2S} contained \num{1.6d-16} M \chemfig{S^{2-}} and \num{2.6d-17} M \chemfig{Ag^+}.
Calculate the solubility product of \chemfig{Ag_2S}.
\vspace{.85in}
\question A small piece of the mineral smithsonite, \chemfig{ZnCO_3}, with a mass of 0.000 14 g just barely dissolves in
100.0 mL of water. Calculate \chemfig{K_{sp}}
for \chemfig{ZnCO_3}.
\vspace{.85in}
\question What is the concentration of \chemfig{OH^{-}} in a saturated solution of \chemfig{Zn{(OH)}_2}? \chemfig{K_{sp}} = \num{4.1d-17} for \chemfig{Zn{(OH)}_2}.
\vspace{.85in}
\setcounter{question}{54}
\question The data below was obtained when a student combined various solutions of \chemfig{Mn{(NO_3)}_2} and KOH.
\begin{center}
\begin{tabular}{|c| c |c|}
\hline
Trial & [\chemfig{Mn^{2+}}] & [\chemfig{OH^{-}}] \\ [1.0ex]
\hline
1 & \num{2.1d-5}M & \num{1.0d-4}M \\
\hline
2 & \num{7.8d-4}M & ? \\
\hline
\end{tabular}
\end{center}
What is the value of the [\chemfig{OH^{-}}] in Trial 2?
\end{questions}
\end{document}