A solution has 2 moles solute and 3 moles solvent. What is the mole fraction of solute?
Answer and explanation
Correct answer: 0.4
The governing concept is mole fraction: the mole fraction of a component equals its moles divided by the total moles of all components. Total moles = 2 + 3 = 5 mol. Therefore, the solute mole fraction is xsolute = 2/5 = 0.4, so option A is correct. The value 0.6 is the solvent fraction, 0.5 is an incorrect average, and 2.5 cannot be a mole fraction because mole fractions lie between 0 and 1.
Frequently asked questions
What is the correct answer to this question?
0.4
Why is this the correct answer?
The governing concept is mole fraction: the mole fraction of a component equals its moles divided by the total moles of all components. Total moles = 2 + 3 = 5 mol. Therefore, the solute mole fraction is xsolute = 2/5 = 0.4, so option A is correct. The value 0.6 is the solvent fraction, 0.5 is an incorrect average, and 2.5 cannot be a mole fraction because mole fractions lie between 0 and 1.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
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