A 1.35 m solution of NaOCl in water is prepared. What is the mole fraction of the NaOCl
A) 0.0135
B) 0.0243
C) 0.0271
D) 0.0237
E) 0.0263

Question

Quizplus · Accepted Answer

The mole fraction of a component in a solution is given by the formula: mole fraction = moles of solute / (moles of solute + moles of solvent). A 1.35 M solution means there are 1.35 moles of NaOCl in 1 liter (or 1000 mL) of solution. The density of water is approximately 1 g/mL, so 1000 mL of water weighs about 1000 g. The molar mass of water is 18.015 g/mol, so there are 1000 g / 18.015 g/mol = 55.51 moles of water. The mole fraction of NaOCl is then 1.35 / (1.35 + 55.51) = 0.0237.

A 135 M Solution of NaOCl in Water Is Prepared