JEE Exam > JEE Questions > When20 g of naphthoic acid (C11H8O2) i...
Start Learning for Free
When 20 g of naphthoic acid (C11H8O2) is dissolved in 50 g50 g of benzene (kf = 1.72 K kg mol−1), a freezing point depression of 2 K is observed. Calculate the Van't Hoff factor (i) in this case:
- a)0.5
- b)1
- c)2
- d)3
Correct answer is option 'A'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
When20 g of naphthoic acid (C11H8O2) is dissolved in50 g...
Calculation of Vant Hoff factor (i)
1. Given Data:
- Mass of naphthoic acid (m1) = 20 g
- Mass of benzene (m2) = 50 g
- Freezing point depression (ΔTf) = 2 K
- Freezing point constant (kf) = 1.72 K kg mol-1
2. Calculating molality (m):
Molality (m) = moles of solute / kg of solvent
Moles of naphthoic acid = 20 g / molar mass of naphthoic acid
Moles of benzene = 50 g / molar mass of benzene
m = moles of naphthoic acid / (mass of benzene in kg)
3. Calculating the Vant Hoff factor (i):
ΔTf = i * kf * m
i = ΔTf / (kf * m)
Substitute the values of ΔTf, kf, and m to calculate i.
4. Final Calculation:
i = 2 / (1.72 * m)
Substitute the calculated molality value in the above equation to find the Vant Hoff factor (i).
Therefore, after calculating, the Vant Hoff factor (i) comes out to be 0.5. Hence, option (a) is the correct answer.
1. Given Data:
- Mass of naphthoic acid (m1) = 20 g
- Mass of benzene (m2) = 50 g
- Freezing point depression (ΔTf) = 2 K
- Freezing point constant (kf) = 1.72 K kg mol-1
2. Calculating molality (m):
Molality (m) = moles of solute / kg of solvent
Moles of naphthoic acid = 20 g / molar mass of naphthoic acid
Moles of benzene = 50 g / molar mass of benzene
m = moles of naphthoic acid / (mass of benzene in kg)
3. Calculating the Vant Hoff factor (i):
ΔTf = i * kf * m
i = ΔTf / (kf * m)
Substitute the values of ΔTf, kf, and m to calculate i.
4. Final Calculation:
i = 2 / (1.72 * m)
Substitute the calculated molality value in the above equation to find the Vant Hoff factor (i).
Therefore, after calculating, the Vant Hoff factor (i) comes out to be 0.5. Hence, option (a) is the correct answer.
Attention JEE Students!
To make sure you are not studying endlessly, EduRev has designed JEE study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in JEE.
|
Explore Courses for JEE exam
|
|
Top Courses for JEEView all
When20 g of naphthoic acid (C11H8O2) is dissolved in50 g50 gof benzene (kf = 1.72Kkgmol−1), a freezing point depression of2 K is observed. Calculate the Vant Hoff factor (i) in this case:a)0.5b)1c)2d)3Correct answer is option 'A'. Can you explain this answer?
Question Description
When20 g of naphthoic acid (C11H8O2) is dissolved in50 g50 gof benzene (kf = 1.72Kkgmol−1), a freezing point depression of2 K is observed. Calculate the Vant Hoff factor (i) in this case:a)0.5b)1c)2d)3Correct answer is option 'A'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about When20 g of naphthoic acid (C11H8O2) is dissolved in50 g50 gof benzene (kf = 1.72Kkgmol−1), a freezing point depression of2 K is observed. Calculate the Vant Hoff factor (i) in this case:a)0.5b)1c)2d)3Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for When20 g of naphthoic acid (C11H8O2) is dissolved in50 g50 gof benzene (kf = 1.72Kkgmol−1), a freezing point depression of2 K is observed. Calculate the Vant Hoff factor (i) in this case:a)0.5b)1c)2d)3Correct answer is option 'A'. Can you explain this answer?.
When20 g of naphthoic acid (C11H8O2) is dissolved in50 g50 gof benzene (kf = 1.72Kkgmol−1), a freezing point depression of2 K is observed. Calculate the Vant Hoff factor (i) in this case:a)0.5b)1c)2d)3Correct answer is option 'A'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about When20 g of naphthoic acid (C11H8O2) is dissolved in50 g50 gof benzene (kf = 1.72Kkgmol−1), a freezing point depression of2 K is observed. Calculate the Vant Hoff factor (i) in this case:a)0.5b)1c)2d)3Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for When20 g of naphthoic acid (C11H8O2) is dissolved in50 g50 gof benzene (kf = 1.72Kkgmol−1), a freezing point depression of2 K is observed. Calculate the Vant Hoff factor (i) in this case:a)0.5b)1c)2d)3Correct answer is option 'A'. Can you explain this answer?.
Solutions for When20 g of naphthoic acid (C11H8O2) is dissolved in50 g50 gof benzene (kf = 1.72Kkgmol−1), a freezing point depression of2 K is observed. Calculate the Vant Hoff factor (i) in this case:a)0.5b)1c)2d)3Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for JEE.
Download more important topics, notes, lectures and mock test series for JEE Exam by signing up for free.
Here you can find the meaning of When20 g of naphthoic acid (C11H8O2) is dissolved in50 g50 gof benzene (kf = 1.72Kkgmol−1), a freezing point depression of2 K is observed. Calculate the Vant Hoff factor (i) in this case:a)0.5b)1c)2d)3Correct answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
When20 g of naphthoic acid (C11H8O2) is dissolved in50 g50 gof benzene (kf = 1.72Kkgmol−1), a freezing point depression of2 K is observed. Calculate the Vant Hoff factor (i) in this case:a)0.5b)1c)2d)3Correct answer is option 'A'. Can you explain this answer?, a detailed solution for When20 g of naphthoic acid (C11H8O2) is dissolved in50 g50 gof benzene (kf = 1.72Kkgmol−1), a freezing point depression of2 K is observed. Calculate the Vant Hoff factor (i) in this case:a)0.5b)1c)2d)3Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of When20 g of naphthoic acid (C11H8O2) is dissolved in50 g50 gof benzene (kf = 1.72Kkgmol−1), a freezing point depression of2 K is observed. Calculate the Vant Hoff factor (i) in this case:a)0.5b)1c)2d)3Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice When20 g of naphthoic acid (C11H8O2) is dissolved in50 g50 gof benzene (kf = 1.72Kkgmol−1), a freezing point depression of2 K is observed. Calculate the Vant Hoff factor (i) in this case:a)0.5b)1c)2d)3Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice JEE tests.
|
|
Explore Courses for JEE exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup