Ask Question
23 November, 05:19

The vapor pressure of water at 45oC is 71.88 mmHg. What is the vapor pressure of a sugar (C12H22O11) solution made by dissolving 50.36 g of sugar in 88.69 g of water

+2
Answers (1)
  1. 23 November, 08:46
    0
    69.79 mmHg is the pressure for the solution

    Explanation:

    Formula for vapor pressure lowering:

    Vapor pressure of pure solvent (P°) - Vapor pressure of solution (P') = P°. Xm

    Xm → Molar fraction of solute (moles of solute / Total moles)

    Total moles = Moles of solute + Moles of solvent

    Let's determine the moles:

    50.36 g. 1mol/342 g = 0.147 moles of sugar

    88.69 g. 1mol / 18g = 4.93 moles of water

    Total moles = 0.147 + 4.93 = 5.077 moles

    Xm = 0.147 / 5.077 = 0.0289

    If we replace data given in the formula:

    71.88 mHg - P' = 71.88 mmHg. 0.0289. 0.0289

    P' = - (71.88 mmHg. 0.0289 - 71.88 mmHg)

    P' = 69.79 mmHg
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “The vapor pressure of water at 45oC is 71.88 mmHg. What is the vapor pressure of a sugar (C12H22O11) solution made by dissolving 50.36 g of ...” in 📙 Chemistry if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers