Questions: compound formula major species present when dissolved in water --- --- --- copper(II) bromide CuBr2 acetone (CH3)2CO potassium nitrate KNO3

Transcript text: \begin{tabular}{|c|c|c|} \hline compound & formula & \begin{tabular}{c} major species present \\ when dissolved in water \end{tabular} \\ \hline copper(II) bromide & $\mathrm{CuBr}_{2}$ & $\square$ \\ \hline acetone & $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CO}$ & $\square$ \\ \hline potassium nitrate & $\mathrm{KNO}_{3}$ & $\square$ \\ \hline \end{tabular}

Solution

Solution Steps

Step 1: Identify the Major Species for Copper(II) Bromide

Copper(II) bromide, $\mathrm{CuBr}_2$, is an ionic compound. When dissolved in water, it dissociates into its constituent ions. The major species present in solution are the copper(II) ions and bromide ions. The dissociation can be represented as: \[ \mathrm{CuBr}_2 \rightarrow \mathrm{Cu}^{2+} + 2\mathrm{Br}^- \]

Step 2: Identify the Major Species for Acetone

Acetone, $(\mathrm{CH}_3)_2\mathrm{CO}$, is a molecular compound and does not dissociate into ions in water. It remains as acetone molecules in solution. Therefore, the major species present is the acetone molecule itself.

Step 3: Identify the Major Species for Potassium Nitrate

Potassium nitrate, $\mathrm{KNO}_3$, is another ionic compound. When dissolved in water, it dissociates into potassium ions and nitrate ions. The dissociation can be represented as: \[ \mathrm{KNO}_3 \rightarrow \mathrm{K}^+ + \mathrm{NO}_3^- \]