A solution has mole fraction of solute 0.6. What is the mole percent of solvent in the same binary solution?
Answer and explanation
Correct answer: 40 percent
For a binary solution containing only solute and solvent, their mole fractions must add to one: xsolute + xsolvent = 1. Therefore, xsolvent = 1 − 0.6 = 0.4. Mole percent is obtained by multiplying the mole fraction by 100, so solvent mole percent = 0.4 × 100 = 40%. Option A is correct; 60% is the solute mole percent, not the solvent value.
Frequently asked questions
What is the correct answer to this question?
40 percent
Why is this the correct answer?
For a binary solution containing only solute and solvent, their mole fractions must add to one: xsolute + xsolvent = 1. Therefore, xsolvent = 1 − 0.6 = 0.4. Mole percent is obtained by multiplying the mole fraction by 100, so solvent mole percent = 0.4 × 100 = 40%. Option A is correct; 60% is the solute mole percent, not the solvent value.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Some Basic Concepts of Chemistry. Topic: Mole concept and molar mass.
