Chemistry

What will be the freezing point of a solution made by dissolving 5.25 g of naphthalene (C10H8) in 100.0 g benzene (C6H6?). The normal freezing point of benzene is 5.5°C and K f (benzene) is 5.12°C / m.

  1. 👍 0
  2. 👎 0
  3. 👁 898
asked by Emily
  1. mols naphthalene = grams/molar mass = ?
    molality = m = mols naphthalene/kg solvent
    Then delta T = Kf*m and solve for delta T. Subtract from the normal freezing point to arrive at the new freezing point.

    1. 👍 1
    2. 👎 0
    posted by DrBob222
  2. 3.4

    1. 👍 2
    2. 👎 0
    posted by carrie

Respond to this Question

First Name

Your Response

Similar Questions

  1. CHEM- solution/freezing piont

    a solution of sulfur (2.560g) in naphthalene (100g) freezes 0.68K lower the freezing point of pure naphthalene (353.10K). for naphthalene, Kf= 6.8K kg mol. calculatem the molecular formula of the sulfur dissolved in the

    asked by lulu on October 14, 2010
  2. Chemistry

    If the freezing point of pure toluene is -95.15 oC and its freezing point depression constant is -8.38 oC/molal, what is the freezing point of a solution made by dissolving 39.338g of anthracene (C14H10) in 150.0mL of toluene?

    asked by Jaden on January 30, 2013
  3. Chemistry

    The equation for lowering the freezing point of a solvent is given in your manual. Given that the freezing point for the pure solvent is 79.4 °C , the molality is 0.1 m , and the freezing point depression constant is 6.9 °C/m ,

    asked by Asia on September 13, 2015
  4. Chemistry

    Benzene (C6H6) has a normal freezing point of 5.50oC and a density of 0.88 g/mL. When 1.28 g of naphthalene (C10H8) is dissolved in 125 mL of benzene, the freezing point of the solution is 5.03oC. Determine the molal freezing

    asked by Sarah on February 8, 2017
  5. Chemistry

    A solution was made by dissolving 62.07 grams of a compound in 500g of water. The compound was not ionic. The freezing point of the solution was measured and found to be -1.86 degrees celsius. Using the Kf value in your textbook,

    asked by Hannah on February 12, 2012
  6. Chemistry

    The freezing point of benzene is 5.5°C. What is the freezing point of a solution of 8.50 g of naphthalene (C10H8) in 425 g of benzene (Kf of benzene = 4.90°C/m)? I worked this problem for someone just a couple of days ago. delta

    asked by Kelly on January 24, 2007
  7. chemistry

    A solution is made by dissolving 21.5 grams of glucose (C6H12O6) in 255 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m?

    asked by ryan on September 25, 2011
  8. Chemistry

    A solution is made by dissolving 10.20 grams of glucose (C6H12O6) in 355 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m?

    asked by Maria on January 14, 2011
  9. Chemistry

    A solution is made by dissolving 10.20 grams of glucose (C6H12O6) in 355 grams of water. What is the freezing point depression of the solvent if the freezing point constant is -1.86 °C/m?

    asked by Joseph on May 19, 2017
  10. chemistry

    1. Find the molality of the solution prepared by dissolving 0.238g toluene, C7H8, in 15.8g cyclohexane 2. A pure sample of the solvent phenol has a freezing point of 40.85 degrees C. A 0.414 molal solution of isopropyl alcohol was

    asked by kales on February 9, 2015

More Similar Questions