🤓 Based on our data, we think this question is relevant for Professor Schmid's class at PSU.

In this problem, we are asked to find the highest concentration of the potassium ions among the solutions with a molar of 0.20 M KCl, 0.15 M K_{2}CrO_{4}, or 0.080 M K_{3}PO_{4}.

**MOLARITY (M)** represents the moles of solute dissolved per liters of solution.

$\overline{){\mathbf{M}}{\mathbf{=}}\frac{\mathbf{moles}\mathbf{}\mathbf{of}\mathbf{}\mathbf{solute}}{\mathbf{Liters}\mathbf{}\mathbf{of}\mathbf{}\mathbf{solution}}}$

**In answering this problem, we must:**

**Step 1. **Know the individual ions in each compound.

**Step 2. **Find the concentration of potassium ions in each compound.

**Step 3. **Compare the concentrations of potassium ions in each compound.

Which will have the highest concentration of potassium ion: 0.20 M KCl, 0.15 M K_{2}CrO_{4}, or 0.080 M
K_{3}PO_{4}?