A solute has a normal molar mass of 100 g mol⁻¹ and an observed molar mass of 125 g mol⁻¹. What is the value of i?
Answer and explanation
Correct answer: 0.8
The relation between the van’t Hoff factor and molar masses is i = Mnormal/Mobserved. Substituting the given values gives i = 100/125 = 0.8. Since i is less than one, the result is consistent with association of solute particles, which reduces the number of effective particles. A value above one would instead suggest dissociation or another particle-increasing effect.
Frequently asked questions
What is the correct answer to this question?
0.8
Why is this the correct answer?
The relation between the van’t Hoff factor and molar masses is i = Mnormal/Mobserved. Substituting the given values gives i = 100/125 = 0.8. Since i is less than one, the result is consistent with association of solute particles, which reduces the number of effective particles. A value above one would instead suggest dissociation or another particle-increasing effect.
Which subject and chapter does this question cover?
This is a Class 12 Chemistry question. Chapter: Chapter 01: Solutions. Topic: 6: Molar Mass Determination.
