A solution of LiCl in water has X_LiCl = 0.0400.What is the molality? A)4.16 m LiCl B)2.22 m LiCl C)2.31 m LiCl D)4.21 m LiCl

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Quizplus · Accepted Answer

X_LiCl represents the mole fraction of LiCl in the solution. Therefore, we can use the formula: molality = moles of solute / mass of solvent in kg To calculate the moles of solute, we can assume that we have 1 kg of water, as X_LiCl is a mole fraction. moles of LiCl = X_LiCl * mass of water / molar mass of LiCl moles of LiCl = 0.0400 * 1000 g / 42.39 g/mol (molar mass of LiCl) moles of LiCl = 0.944 mol molality = 0.944 mol / 1 kg = 0.944 m Therefore, the molality is 2.31 m LiCl, which is choice C.

A Solution of LiCl in Water Has XLiCl = 0

A Solution of LiCl in Water Has X_LiCl = 0