* Polarity: Water (H₂O) is a highly polar solvent due to the electronegativity difference between oxygen and hydrogen atoms, creating a partial negative charge on oxygen and partial positive charges on hydrogen. Isopropanol (C₃H₈O) is also polar, but less so than water.

* Ionic Compounds: Potassium chloride is an ionic compound, meaning it is composed of positively charged potassium ions (K⁺) and negatively charged chloride ions (Cl⁻).

* "Like Dissolves Like": Polar solvents like water are good at dissolving ionic compounds. The polar water molecules can surround and separate the ions due to electrostatic interactions. Isopropanol, while polar, is not as good at breaking apart the strong ionic bonds in KCl.

In summary: Water's high polarity and ability to form strong electrostatic interactions with ions make it a better solvent for potassium chloride than isopropanol.