Questions: acid strong or weak? species present at 10^-6 mol/L or greater when dissolved in water --- H2CO3 weak H2S weak HClO2 weak HI strong

Transcript text: \begin{tabular}{|c|c|c|} \hline acid & \begin{tabular}{c} strong or \\ weak? \end{tabular} & \begin{tabular}{c} species present at $\mathbf{1 0} \mathbf{o}^{-6} \mathbf{~ m o l / L}$ or greater \\ when dissolved in water \end{tabular} \\ \hline $\mathrm{H}_{2} \mathrm{CO}_{3}$ & weak & $\square$ \\ \hline $\mathrm{H}_{2} \mathrm{~S}$ & weak & $\square$ \\ \hline $\mathrm{HClO}_{2}$ & weak & $\square$ \\ \hline HI & strong & $\square$ \\ \hline \end{tabular}

Solution

Solution Steps

Step 1: Identify the species present for $\mathrm{H}_{2} \mathrm{CO}_{3}$

$\mathrm{H}_{2} \mathrm{CO}_{3}$ is a weak acid.
In water, it partially dissociates into $\mathrm{H}^{+}$ and $\mathrm{HCO}_{3}^{-}$.
The species present at $10^{-6} \, \text{mol/L}$ or greater are $\mathrm{H}_{2} \mathrm{CO}_{3}$, $\mathrm{H}^{+}$, and $\mathrm{HCO}_{3}^{-}$.

Step 2: Identify the species present for $\mathrm{H}_{2} \mathrm{S}$

$\mathrm{H}_{2} \mathrm{S}$ is a weak acid.
In water, it partially dissociates into $\mathrm{H}^{+}$ and $\mathrm{HS}^{-}$.
The species present at $10^{-6} \, \text{mol/L}$ or greater are $\mathrm{H}_{2} \mathrm{S}$, $\mathrm{H}^{+}$, and $\mathrm{HS}^{-}$.

Step 3: Identify the species present for $\mathrm{HClO}_{2}$

$\mathrm{HClO}_{2}$ is a weak acid.
In water, it partially dissociates into $\mathrm{H}^{+}$ and $\mathrm{ClO}_{2}^{-}$.
The species present at $10^{-6} \, \text{mol/L}$ or greater are $\mathrm{HClO}_{2}$, $\mathrm{H}^{+}$, and $\mathrm{ClO}_{2}^{-}$.