A solution contains 2 mol solute and 8 mol solvent. What is the mole fraction of solute?
Answer and explanation
Correct answer: 0.2
The mole fraction of a component equals its moles divided by the total moles of all components. Total moles = 2 + 8 = 10 mol, so the solute mole fraction is Xsolute = 2/10 = 0.2. Therefore option A is correct. The value 0.8 belongs to the solvent, 0.25 uses an incorrect denominator, and 2.0 cannot be a mole fraction because a fraction cannot exceed one here.
Frequently asked questions
What is the correct answer to this question?
0.2
Why is this the correct answer?
The mole fraction of a component equals its moles divided by the total moles of all components. Total moles = 2 + 8 = 10 mol, so the solute mole fraction is Xsolute = 2/10 = 0.2. Therefore option A is correct. The value 0.8 belongs to the solvent, 0.25 uses an incorrect denominator, and 2.0 cannot be a mole fraction because a fraction cannot exceed one here.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
