A mixture contains acetone (boiling point 56 °C, polar and completely miscible with water), toluene (boiling point 111 °C, non-polar and immiscible with water), and crystalline CuSO₄·5H₂O. Propose a three-step separation scheme that will recover each component in pure form while minimizing energy consumption, and briefly justify the role of intermolecular forces or polarity at each step.