Boiling point constants help us to determine:
Correct answer: A. Molar masses
- A. Molar masses
- B. Volumes
- C. Pressures
- D. Masses
Explanation
Boiling point elevation is a colligative property that depends on the number of solute particles in a solution. The boiling point constant, Kb, is a proportionality constant that relates the molality of a solution to the elevation in boiling point.The equation for boiling point elevation is:ΔTb = Kb x molalitywhere ΔTb is the change in boiling point, Kb is the boiling point constant, and molality is the concentration of the solute in mol/kg of the solvent.By measuring the change in boiling point and knowing the boiling point constant of the solvent, we can calculate the molality of the solution. Then, using the molality and mass of the solute, we can calculate the molar mass of the solute. Therefore, boiling point constants help us to determine molar masses of solutes in solutions.
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Solutions are described using molarity, molality, normality, mole fraction, percentage concentration and parts per million. Coverage also includes vapour-pressure lowering, boiling-point elevation, freezing-point depression and osmotic pressure, then distinguishes true solutions, colloids and suspensions by particle size, stability, light scattering and settling.
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