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A solution containing 30g of non-volatile solute in exactly 90g of water has a vapor pressure of 21.85 mm of Hg at 25oC. Further 18g of water is then added to the solution. The resulting solution has, then, vapor pressure of 22.15 mmHg at same temp. M.wt. of solute will be ?
    Correct answer is '67.83'. Can you explain this answer?
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    A solution containing 30g of non-volatile solute in exactly 90g of wat...
    Let the vapour pressure of water at 25DEGC be p0 and molecular mass of the solute be m.

     Using Raoult’s law in the following form.

     For solution (I), (p0–21.85)/21.85 = 30X18/90DEGm          …(i)

     For solution (II), (p0–22.15)/22.15 = 30X18/108DEGm        …(ii)

     Dividing Eq. (i) by Eq. (ii),

     (p0–21.85)/21.85 X 22.15/(p0–22.15) = 108/90 = 6/5

    Substituting the value of p0 in Eq. (i)

    M = 67.9
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    A solution containing 30g of non-volatile solute in exactly 90g of water has a vapor pressure of 21.85 mm of Hg at 25oC. Further 18g of water is then added to the solution. The resulting solution has, then, vapor pressure of 22.15 mmHg at same temp. M.wt. of solute will be ?Correct answer is '67.83'. Can you explain this answer?
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    A solution containing 30g of non-volatile solute in exactly 90g of water has a vapor pressure of 21.85 mm of Hg at 25oC. Further 18g of water is then added to the solution. The resulting solution has, then, vapor pressure of 22.15 mmHg at same temp. M.wt. of solute will be ?Correct answer is '67.83'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about A solution containing 30g of non-volatile solute in exactly 90g of water has a vapor pressure of 21.85 mm of Hg at 25oC. Further 18g of water is then added to the solution. The resulting solution has, then, vapor pressure of 22.15 mmHg at same temp. M.wt. of solute will be ?Correct answer is '67.83'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A solution containing 30g of non-volatile solute in exactly 90g of water has a vapor pressure of 21.85 mm of Hg at 25oC. Further 18g of water is then added to the solution. The resulting solution has, then, vapor pressure of 22.15 mmHg at same temp. M.wt. of solute will be ?Correct answer is '67.83'. Can you explain this answer?.
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