A solution of LiCl in water is 20.0 wt% LiCl.What is the mole fraction of LiCl? Assume the density of the solution is 1.00 g mL^-1. A)0.0960 B)0.106 C)0.472 D)4.44

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Quizplus · Accepted Answer

The mole fraction of LiCl can be calculated by first determining the moles of LiCl and water in a given mass of solution. For a 100 g solution with 20% wt LiCl, there are 20 g of LiCl and 80 g of water. The molar mass of LiCl is approximately 42.39 g/mol, and for water, it is 18.015 g/mol. Thus, moles of LiCl = 20 g / 42.39 g/mol ≈ 0.472 mol, and moles of water = 80 g / 18.015 g/mol ≈ 4.44 mol. The mole fraction of LiCl (χ_LiCl) is calculated as moles of LiCl / (moles of LiCl + moles of water) = 0.472 / (0.472 + 4.44) ≈ 0.0960.

A Solution of LiCl in Water Is 20