To prevent water in an engine's cooling system from freezing, antifreeze is used as an additive in automotive fluids. The added antifreeze lowers the freezing point of water. Dyes are also added to antifreeze. Why?

Choose the solution that will result in the greatest osmotic pressure at equilibrium.

Adding 1 mol magnesium chloride (MgCl₂) in 1 kg of water will cause a greater increase in boiling point than adding 1 mol of glucose (C₆H₁₂O₆) in the same amount of water. Explain why.