A Newspaper Article Suggested Using a Fertilizer Such as Ammonium

Multiple Choice

A newspaper article suggested using a fertilizer such as ammonium sulfate or ammonium nitrate to lower the melting point of ice on sidewalks because many of the deicing salts can damage lawns and sidewalks. Which of the following compounds would give the largest freezing point depression when 100 g of the compound are dissolved in 1 kg of solvent?

A) NH₄NO₃ (80.1 g/mol)
B) (NH₄) ₂SO₄ (132.1 g/mol)
C) MgSO₄ (120.4 g/mol)
D) CaCl₂ (111.0 g/mol)
E) MgCl₂ (95.2 g/mol)