What is the boiling point elevation of a solution composed of urea in water?

How can we calculate the boiling point of a solution containing urea in water? To determine the boiling point elevation of a solution composed of urea in water, we can utilize the formula for boiling point elevation. By calculating the molality of the urea in the solution and using the molal boiling point elevation constant for water, we can find the boiling point elevation of the solution.

Calculating Boiling Point Elevation

To calculate the boiling point of a solution containing urea in water:
  • Calculate the molality of urea in the solution.
  • Utilize the molal boiling point elevation constant for water.
  • Determine the boiling point elevation of the solution.

Using the Formula

The formula for boiling point elevation: ΔTb = Kb * m
  • ΔTb: Boiling point elevation
  • Kb: Molal boiling point elevation constant for the solvent
  • m: Molality of the solute in the solution

Calculation Steps

  1. Calculate the molality of urea in the solution as moles of urea / mass of water (in kg).
  2. Determine the molal boiling point elevation constant for water (0.51°C/m).
  3. Calculate the boiling point elevation using the formula.
  4. Add the boiling point elevation to the boiling point of pure water (100.0°C) to find the boiling point of the solution.

By following these calculation steps, we can accurately determine the boiling point elevation of a solution containing urea in water.

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