To determine the freezing point depression of a LiCl solution, Toni adds 0.317 g of LiCl to the sample test tube along with 20.5 mL of distilled water. Determine the concentration, in molality, of the resulting solution. MW of LiCl is 42.394 g/mol Density of H2O is 0.9982 g/mL

0.365 m

Explanation:

The definition of molality is:

First we calculate the moles of the solute, LiCl. We do so using its molar mass:

Then we calculate the mass of the solvent, water. We do so using its density:

Finally we calculate the molality of the solution:

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