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A solution is prepared by mixing 8.5 g of CH2Cl2 and 11.95 g of CHCl3. If vapour pressure of CH2Cl2 and CHCl3 at 298 K are 415 and 200 mmHg respectively, the mole fraction of CHCl3 in vapour form is: (Molar mass of Cl=35.5 g mol−1)
  • a)
    0.162
  • b)
    0.675
  • c)
    0.325
  • d)
    0.486
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
A solution is prepared by mixing 8.5 g of CH2Cl2 and 11.95 g of CHCl3....
To find the mole fraction of CHCl3 in the vapor form, we need to calculate the total moles of both CH2Cl2 and CHCl3.

First, let's calculate the moles of CH2Cl2:
Molar mass of CH2Cl2 = 12.01 + 2(1.01) + 2(35.5) = 84.93 g/mol
Moles of CH2Cl2 = 8.5 g / 84.93 g/mol = 0.10 mol

Next, let's calculate the moles of CHCl3:
Molar mass of CHCl3 = 12.01 + 3(35.5) = 119.37 g/mol
Moles of CHCl3 = 11.95 g / 119.37 g/mol = 0.10 mol

Now, let's calculate the total moles:
Total moles = moles of CH2Cl2 + moles of CHCl3 = 0.10 mol + 0.10 mol = 0.20 mol

Now, let's calculate the mole fraction of CHCl3:
Mole fraction of CHCl3 = moles of CHCl3 / total moles = 0.10 mol / 0.20 mol = 0.50

Therefore, the mole fraction of CHCl3 in the vapor form is 0.50.
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A solution is prepared by mixing 8.5 g of CH2Cl2 and 11.95 g of CHCl3. If vapour pressure of CH2Cl2 and CHCl3 at 298 K are 415 and 200 mmHg respectively, the mole fraction of CHCl3 in vapour form is: (Molar mass of Cl=35.5 g mol−1)a)0.162b)0.675c)0.325d)0.486Correct answer is option 'A'. Can you explain this answer? for JEE 2025 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about A solution is prepared by mixing 8.5 g of CH2Cl2 and 11.95 g of CHCl3. If vapour pressure of CH2Cl2 and CHCl3 at 298 K are 415 and 200 mmHg respectively, the mole fraction of CHCl3 in vapour form is: (Molar mass of Cl=35.5 g mol−1)a)0.162b)0.675c)0.325d)0.486Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for JEE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A solution is prepared by mixing 8.5 g of CH2Cl2 and 11.95 g of CHCl3. If vapour pressure of CH2Cl2 and CHCl3 at 298 K are 415 and 200 mmHg respectively, the mole fraction of CHCl3 in vapour form is: (Molar mass of Cl=35.5 g mol−1)a)0.162b)0.675c)0.325d)0.486Correct answer is option 'A'. Can you explain this answer?.
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