chemistry

posted by .

How many grams of sucrose (C12H22O11)
must be dissolved in 200 g water to make
a solution in which the mole fraction of su-
crose is 0.1?
Answer in units of g

  • chemistry -

    200 g H2O is how many mols? That's g/molar mass.
    total mol = n sucrose + n H2O
    n sucrose = grams/molar mass sucrose

    [n sucrose/(n sucroswe + nH2O)] = 0.1
    Substitute grams/molar mass for n sucrose and solve for grams.

  • chemistry -

    i got 11.098 for the moles for the first part. so do i add .1 to that?

  • chemistry -

    No. Also if I divide 200/18.015 = 11.102 which is more s.f. than allowed but I carry them and drop at the end of the problem. You can't add them. 11.1 is mols H2O. The 0.1 is not mols sucrose; that 0.1 is the mole fraction of sucrose.
    You must solve this.
    [(x/342)/(x/342)+(11.1)] = 0.1 and solve for x = grams sucrose (Note: x/342 = mols sucrose)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    How many grams of sucrose (C12H22O11) must be dissolved in 60 g water to make a solution in which the mole fraction of sucrose is 0.2?
  2. chemistry

    How many grams of sucrose,C12H22O11 must be dissolved in 750.mL of water to prepare a 0.250 molal solution?
  3. Chemistry

    How many grams of sucrose (C12H22O11) must be dissolved in 200 g water to make a solution in which the mole fraction of sucrose is 0.2?
  4. Chemistry

    How many grams of sucrose (C12H22O11) must be dissolved in 200 g water to make a solution in which the mole fraction of sucrose is 0.2?
  5. Chemistry

    Reviewing for final (this should be basic but...I am stuck): Describe how you would prepare 500.0 grams of a solution of sucrose, C12H22O11, in water which the mole fraction of sucrose is 0.125. I feel like somehow this is a molality …
  6. AP Chemistry

    How many grams of sucrose (C12H22O11) must be dissolved in 60 g water to make a solution in which the mole fraction of sucrose is 0.4?
  7. Chemisty

    A solution is prepared by dissolving 3.44 g of sucrose, C12H22O11, in 118 g of water. a) What is the molality of the resulting solution?
  8. Chemistry Check Please!

    A solution is prepared by dissolving 3.44 g of sucrose, C12H22O11, in 118 g of water. a) What is the molality of the resulting solution?
  9. Chemistry Check Please! ?Fixed

    A solution is prepared by dissolving 3.44 g of sucrose, C12H22O11, in 118 g of water. a) What is the molality of the resulting solution?
  10. chemistry

    7.00 grams of sugar (C12H22O11) are dissolved in water to make 1 L of solution. What is the concentration of this solution?

More Similar Questions