Identify the solute with the lowest van't Hoff factor. A) nonelectrolyte B) KI C) MgSO₄ D) CaCl₂ E) AlCl₃

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A nonelectrolyte does not dissociate in solution, so it has a van't Hoff factor of 1 (or very close to 1). Therefore, it has the lowest van't Hoff factor compared to the electrolytes listed (KI, MgSO4, CaCl2, AlCl3) which all have higher van't Hoff factors due to their ability to dissociate in solution.

Identify the Solute with the Lowest Van't Hoff Factor