Which of the following solutes is most effective in lowering the freezing point of water?

1 Answer
Ben B.
Jun 1, 2017

#AlCl_3#

Explanation:

The more ions that dissociate in the water, the lower the freezing point becomes. Of the solutes listed, a, b, and c are ionic compounds. d is a covalent molecule and will therefore not dissolve in water.
The ionic compound which dissociates into the highest number of ions is #AlCl_3# (#1 Al^3+ 3 Cl^-#). It contains four ions.

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