Question

A solution of LiCl in water has XLiCl = 0.0800. What is the molality? A solution of LiCl in water has XLiCl = 0.0800. What is the molality? 4.44 m LiCl 8.70 m LiCl 4.83 m LiCl 4.01 m LiCl

Answer 1

The correct molality of the LiCl solution cannot be determined from the mole fraction (XLiCl = 0.0800) alone as the mass of the solvent is needed for this calculation.

Step-by-step explanation:

The student is interested in determining the molality of a solution with a given mole fraction of LiCl (XLiCl = 0.0800). Molality is a measure of the concentration of a solute in a solution, expressed as moles of solute per kilogram of solvent. However, to calculate molality from mole fraction, additional information, such as the total mass of the solution or the mass of the solvent, is necessary. Without this information, we cannot calculate the molality from the mole fraction alone. Therefore, from the options provided, we cannot determine which one is the correct molality without further details regarding the mass of the solvent.

Answer 2

mol LiCl = 4.83 m

Step-by-step explanation:

GIven:

Solution of LiCl in water XLiCl = 0.0800

Mol of water in kg = 55.55 mole

Find:

Molality

Computation:

mole fraction = mol LiCl / (mol water + mol LiCl)

0.0800 = mol LiCl / (55.55 mol + mol LiCl)

0.0800 mol LiCl + 4.444 mol = mol LiCl

mol LiCl - 0.0800 mol LiCl = 4.444 mol

0.92 mol LiCl = 4.444 mol

mol LiCl = 4.83 m