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ProfessorAdding a solute to a solvent lowers the vapor pressure of the solution compared to the pure solvent. This is due to the solute molecules occupying some of the surface area that would have been available for solvent molecules to evaporate. As a result, fewer solvent molecules are able to escape into the gas phase, leading to a decrease in vapor pressure.
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What will adding solute to pure solvents cause?
Adding solute to pure solvents will cause the solute to dissolve in the solvent, forming a solution. This process can alter the properties of the solvent, such as its boiling point, freezing point, and osmotic pressure, depending on the amount and nature of the solute added.
What happens to vapor pressure as more solute such as sugar is added to a solution?
The vapor pressure of the solution decreases as more solute is added. This is because the presence of the solute particles restricts the movement of solvent molecules, making it harder for them to escape into the vapor phase. As a result, the overall vapor pressure of the solution is lower than that of the pure solvent.
Is increase of vapor pressure a colligative property?
Yes, an increase in vapor pressure is a colligative property. Colligative properties depend on the number of solute particles in a solution, not their identity. Therefore, increasing the concentration of a solute in a solution will result in an increase in vapor pressure due to reduced effective solute-solvent interactions.
How does the addition of salt affect the vapor pressure of water?
Adding salt to water decreases the vapor pressure of the water. This is because the salt particles disrupt the formation of water vapor molecules at the surface of the water, making it harder for them to escape into the air.
Which of the colligative properties is not dependent on vapor pressure boiling point elevation vapor pressure reduction osmotic pressure?
Boiling point elevation is not dependent on vapor pressure. It is based on the solute concentration in the solution, which raises the boiling point compared to the pure solvent. The other colligative properties, vapor pressure reduction and osmotic pressure, are directly related to the concentration of solute particles in the solution.
