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chap3q56_69.tex
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chap3q56_69.tex
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\documentclass[fleqn]{exam}
\usepackage{chemfig}
\usepackage{siunitx}
\begin{document}
\begin{questions}
\setcounter{question}{55}
\question Will a precipitate form if 1.0 L of \num{3.0d-10} M \chemfig{Fe^{2+}} is added to 1.0 L of \num{1.2d-8} M \chemfig{S^{2-}}?
\vspace{1.75in}
\setcounter{question}{57}
\question What \chemfig{F^{-}} concentration must be present to just start precipitating \chemfig{CaF_2} from a \num{3.0d-3} M solution of \chemfig{Ca{(}NO_3{)}_2}? \chemfig{K_{sp}} = \num{1.5d-10} for \chemfig{CaF_2}.
\vspace{1.75in}
\question Will a precipitate form when 10.0 mL of \num{1.0d-3} M \chemfig{Pb{(}NO_3{)}_2} is added to 40.0 mL of \num{1.5d-4} M \chemfig{Na_2SO_4}?
\vspace{1.75in}
\question A precipitate barely forms when 20.0 mL of \num{3.00d-3} M \chemfig{Ni^{2+}} is added to 60.0 mL of \num{2.52d-4} M \chemfig{CO^{2-}_3} What is \chemfig{K_{sp}} for \chemfig{NiCO_3}?
\vspace{1.75in}
\question Does a precipitate form when 25.0 mL of \num{1.0d-4} M \chemfig{Zn{(}NO_3{)}_2} is added to 45.0 mL of \num{2.4d-5} M \chemfig{Ca{(}OH{)}_2}? \chemfig{K_{sp}} = \num{4.1d-17} for \chemfig{Zn{(}OH{)}_2}.
\vspace{1.75in}
\question When 100.0 mL of \num{4.0d-2} M \chemfig{CaCl_2} is added to 150.0 mL of \num{2.9d-2} M NaOH, a precipitate of \chemfig{Ca{(}OH{)}_2} just starts to form. What is \chemfig{K_{sp}} for \chemfig{Ca{(}OH{)}_2}?
\vspace{1.75in}
\setcounter{question}{63}
\question Predict whether a precipitate will form when 20.0 mL of \num{5.0d-5} M \chemfig{Ca^{2+}} is added to 35.0 mL of \num{2.5d-4} M \chemfig{C_2O^{2-}_4} and the resulting solution is boiled down to a total volume of 25.0 mL.
\vspace{1.75in}
\question If a precipitate can be detected as soon as it begins to form, what is the minimum concentration of \chemfig{CO^{2-}_3} that can be detected in a solution having [\chemfig{Ag^+} ] = 0.050 M?
\vspace{1.75in}
\setcounter{question}{68}
\question If 0.02 M \chemfig{AgNO_3} is added to a solution containing 1.0 M \chemfig{CO^{2-}_3}, 1.0 M \chemfig{lO^{-}_3} and 1.0 M \chemfig{CrO^{2-}_4}, which precipitate will form first?
\end{questions}
\end{document}