Questions: Some chemical compounds are listed in the first column of the table below. Each compound is soluble in water. Imagine that a few tenths of a mole of each compound is dissolved in a liter of water. The important chemical species that would be present in this solution are written in the second column of the table. Use the checkboxes to classify each compound. compound important species present when dissolved in water type of compound (check all that apply) --------- ionic molecular strong acid weak acid strong base weak base HCl H3O+, Cl-, H2O ○ ☐ ☐ 0 0 0 KOH K+, OH-, H2O ☐ 0 ○ 0 ○ 0 C2H5NH2 C2H5NH3+, OH-, C2H5NH2, H2O 0 ☐ ○ ○ ○ O HNO2 H3O+, NO2-, HNO2, H2O ○ 0 O 0 O 0

Some chemical compounds are listed in the first column of the table below. Each compound is soluble in water. Imagine that a few tenths of a mole of each compound is dissolved in a liter of water. The important chemical species that would be present in this solution are written in the second column of the table. Use the checkboxes to classify each compound. compound important species present when dissolved in water type of compound (check all that apply) --------- ionic molecular strong acid weak acid strong base weak base HCl H3O+, Cl-, H2O ○ ☐ ☐ 0 0 0 KOH K+, OH-, H2O ☐ 0 ○ 0 ○ 0 C2H5NH2 C2H5NH3+, OH-, C2H5NH2, H2O 0 ☐ ○ ○ ○ O HNO2 H3O+, NO2-, HNO2, H2O ○ 0 O 0 O 0
Transcript text: Some chemical compounds are listed in the first column of the table below. Each compound is soluble in water. Imagine that a few tenths of a mole of each compound is dissolved in a liter of water. The important chemical species that would be present in this solution are written in the second column of the table. Use the checkboxes to classify each compound. \begin{tabular}{|c|c|c|c|c|c|c|c|} \hline \multirow[b]{2}{*}{ compound } & \multirow{2}{*}{\begin{tabular}{l} important species present \\ when dissolved in water \end{tabular}} & \multicolumn{6}{|l|}{ type of compound (check all that apply) } \\ \hline & & ionic & molecular & \begin{tabular}{l} strong \\ acid \end{tabular} & \begin{tabular}{l} weak \\ acid \end{tabular} & \begin{tabular}{l} strong \\ base \end{tabular} & \begin{tabular}{l} weak \\ base \end{tabular} \\ \hline HCl & $\mathrm{H}_{3} \mathrm{O}^{+}, \mathrm{Cl}^{-}, \mathrm{H}_{2} \mathrm{O}$ & ○ & $\square$ & $\square$ & 0 & 0 & 0 \\ \hline KOH & $\mathrm{K}^{+}, \mathrm{OH}^{-}, \mathrm{H}_{2} \mathrm{O}$ & $\square$ & 0 & ○ & 0 & ○ & 0 \\ \hline $\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{2}$ & $\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{3}^{+}, \mathrm{OH}^{-}, \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{2}, \mathrm{H}_{2} \mathrm{O}$ & 0 & $\bigcirc$ & ○ & ○ & ○ & O \\ \hline $\mathrm{HNO}_{2}$ & $\mathrm{H}_{3} \mathrm{O}^{+}, \mathrm{NO}_{2}^{-}, \mathrm{HNO}_{2}, \mathrm{H}_{2} \mathrm{O}$ & ○ & 0 & O & 0 & O & 0 \\ \hline \end{tabular}
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Solution

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Solution Steps

Step 1: Identify the Type of Compound for HCl

HCl dissociates completely in water to form \( \mathrm{H}_{3} \mathrm{O}^{+} \) and \( \mathrm{Cl}^{-} \). This indicates that HCl is an ionic compound and a strong acid.

Step 2: Identify the Type of Compound for KOH

KOH dissociates completely in water to form \( \mathrm{K}^{+} \) and \( \mathrm{OH}^{-} \). This indicates that KOH is an ionic compound and a strong base.

Step 3: Identify the Type of Compound for \( \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{2} \)

\( \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{2} \) (ethylamine) partially dissociates in water to form \( \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{3}^{+} \) and \( \mathrm{OH}^{-} \). This indicates that \( \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{2} \) is a molecular compound and a weak base.

Final Answer

\[ \begin{array}{|c|c|c|c|c|c|c|c|} \hline \text{compound} & \text{important species present} & \text{ionic} & \text{molecular} & \text{strong acid} & \text{weak acid} & \text{strong base} & \text{weak base} \\ \hline \text{HCl} & \mathrm{H}_{3} \mathrm{O}^{+}, \mathrm{Cl}^{-}, \mathrm{H}_{2} \mathrm{O} & \boxed{\text{✓}} & \boxed{\text{✗}} & \boxed{\text{✓}} & \boxed{\text{✗}} & \boxed{\text{✗}} & \boxed{\text{✗}} \\ \hline \text{KOH} & \mathrm{K}^{+}, \mathrm{OH}^{-}, \mathrm{H}_{2} \mathrm{O} & \boxed{\text{✓}} & \boxed{\text{✗}} & \boxed{\text{✗}} & \boxed{\text{✗}} & \boxed{\text{✓}} & \boxed{\text{✗}} \\ \hline \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{2} & \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{3}^{+}, \mathrm{OH}^{-}, \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{2}, \mathrm{H}_{2} \mathrm{O} & \boxed{\text{✗}} & \boxed{\text{✓}} & \boxed{\text{✗}} & \boxed{\text{✗}} & \boxed{\text{✗}} & \boxed{\text{✓}} \\ \hline \mathrm{HNO}_{2} & \mathrm{H}_{3} \mathrm{O}^{+}, \mathrm{NO}_{2}^{-}, \mathrm{HNO}_{2}, \mathrm{H}_{2} \mathrm{O} & \boxed{\text{✓}} & \boxed{\text{✗}} & \boxed{\text{✗}} & \boxed{\text{✓}} & \boxed{\text{✗}} & \boxed{\text{✗}} \\ \hline \end{array} \]

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