What is the mole fraction of water for a mixture prepared by mixing 50.0 grams of glycerol (non-volatile solute) and 500 grams of H₂O?
Molar Mass(glycerol) = 92.09 g/mol and Molar Mass(H₂O) = 18.02 g/mol

Question

Quizplus · Accepted Answer

First, calculate moles of water: 500 g / 18.02 g/mol = 27.74 mol. Then, calculate moles of glycerol: 50 g / 92.09 g/mol = 0.543 mol. Total moles = 27.74 + 0.543 = 28.283 mol. Mole fraction of water = 27.74 / 28.283 = 0.981.

What Is the Mole Fraction of Water for a Mixture