Why is boiling-point elevation a colligative property?
a.It does not depend on the concentration of particles.
b. is inversely proportional to the concentration of particles in a solution.
c. It is directly proportional to the concentration of particles in a solution.
d. It is independent of changes in vapor pressure.
What is the formula for boiling point elevation?
i don't know but i was thinking of a or c
It is a or c.
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it it a
Boiling-point elevation is considered a colligative property because it depends on the concentration of particles in a solution, rather than the identity of the particles themselves. Therefore, we can eliminate option (a) because boiling-point elevation does, in fact, depend on the concentration of particles.
Now, let's understand why boiling-point elevation is directly related to the concentration of particles in a solution. When a solute is dissolved in a solvent, the boiling point of the solution increases compared to the boiling point of the pure solvent. This elevation occurs because the presence of solute particles disrupts the solvent's vapor pressure, making it more difficult for the solvent molecules to escape the liquid phase and enter the gas phase.
Due to this disruption, the solution needs to reach a higher temperature before its vapor pressure is equal to the surrounding pressure, and boiling can occur. The magnitude of the boiling-point elevation is directly proportional to the concentration of particles in the solution. Therefore, option (c) is the correct answer.
Lastly, option (d) is incorrect because boiling-point elevation is not independent of changes in vapor pressure. Instead, it is precisely caused by the changes in vapor pressure due to the presence of solute particles.