In a solution the mole ratio of solute to solvent is 2 to 3. What is the mole fraction of solute?
Answer and explanation
Correct answer: 0.40
Mole fraction is defined as the moles of the chosen component divided by the total moles of all components. The ratio permits us to take 2 mol solute and 3 mol solvent, giving 5 mol total. Thus, solute mole fraction = 2/(2 + 3) = 2/5 = 0.40. Option C is correct; 0.60 is the solvent fraction, while the smaller values do not use the total correctly.
Frequently asked questions
What is the correct answer to this question?
0.40
Why is this the correct answer?
Mole fraction is defined as the moles of the chosen component divided by the total moles of all components. The ratio permits us to take 2 mol solute and 3 mol solvent, giving 5 mol total. Thus, solute mole fraction = 2/(2 + 3) = 2/5 = 0.40. Option C is correct; 0.60 is the solvent fraction, while the smaller values do not use the total correctly.
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.
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