Calculating Molarity and Mole Fraction Quiz
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Questions and Answers

What quantity is needed to determine the molar mass of the solute in a solution using freezing point depression?

  • Vapor pressure of the solvent
  • Boiling point of the solvent
  • Molal freezing point depression constant (correct)
  • Molar mass of the solvent

    • Which relationship can be used to find the molal freezing point depression constant from the enthalpy of fusion?

  • Kf = R × M1 × Tf2 / 1000 × ∆fusH (correct)
  • Kf = R × M1 × Tf2 / ∆fusH
  • Kf = R × M1 × Tf2 * 1000 / ∆fusH
  • Kf = R × M1 × Tf2 * ∆fusH

    • In the context of freezing point depression, what does the symbol 'Tf' represent?

  • Vaporization point of the solvent
  • Freezing point of the pure solvent (correct)
  • Freezing point of the solution
  • Vaporization point of the solution

    • What is required to determine the molar mass of the solute using freezing point depression?

    <p>Quantities w1, w2, ∆Tf, and molal freezing point depression constant</p> Signup and view all the answers

    Which enthalpy change is used in calculating the molal boiling point elevation constant?

    <p>Enthalpy of vaporization</p> Signup and view all the answers

    What information do you need to know to determine the molal boiling point elevation constant?

    <p>Molar mass of solvent, boiling point of solvent, and enthalpy of vaporization</p> Signup and view all the answers

    Which property directly influences the freezing point depression in a solution?

    <p>Molar mass of the solute</p> Signup and view all the answers

    What factor determines the extent of vapor pressure lowering in a solution?

    <p>Amount of solute dissolved</p> Signup and view all the answers

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