Table of Contents
- 1 What is the difference between the boiling point of a solution with that of a pure solvent?
- 2 What is the difference between a pure solvent and a solution?
- 3 Why boiling point of solution is greater than boiling point of solvent?
- 4 Why boiling point of solution is higher than pure solvent?
- 5 What is difference between dilute and concentrated solution?
- 6 Is the boiling point of a solution lower or higher than the freezing point of a pure solvent?
What is the difference between the boiling point of a solution with that of a pure solvent?
Boiling-point elevation describes the phenomenon that the boiling point of a liquid (a solvent) will be higher when another compound is added, meaning that a solution has a higher boiling point than a pure solvent.
Why boiling point and freezing point for solution is different from pure solvent?
Freezing point is reached when the chemical potential of the pure liquid solvent reaches that of the pure solid solvent. Unlike the boiling point, the chemical potential of the impure solvent requires a colder temperature for it to reach the chemical potential of the pure solid solvent.
What is the difference between a pure solvent and a solution?
A solution is a homogeneous mixture consisting of a solute dissolved into a solvent . The solute is the substance that is being dissolved, while the solvent is the dissolving medium. Solutions can be formed with many different types and forms of solutes and solvents.
What happens to the boiling point of a solution compared to that of a pure solvent once the solute dissolves?
Properties can be considered colligative only if they are dependent on the amount of solute present in the solution, disregarding the identity of the solute itself. The boiling point of a solvent will increase when a solute is dissolved in it. This is referred to as boiling point elevation.
Why boiling point of solution is greater than boiling point of solvent?
The boiling point of a solution, then, will be greater than the boiling point of the pure solvent because the solution (which has a lower vapor pressure) will need to be heated to a higher temperature in order for the vapor pressure to become equal to the external pressure (i.e., the boiling point).
How do we compare boiling point to boiling point elevation?
Boiling point elevation is the raising of a solvent’s boiling point due to the addition of a solute. Similarly, freezing point depression is the lowering of a solvent’s freezing point due to the addition of a solute. In fact, as the boiling point of a solvent increases, its freezing point decreases.
Why boiling point of solution is higher than pure solvent?
How do intermolecular forces affect freezing point?
Molecules with stronger intermolecular forces are pulled together tightly to form a solid at higher temperatures, so their freezing point is higher. Molecules with lower intermolecular forces will not solidify until the temperature is lowered further.
What is difference between dilute and concentrated solution?
A concentrated solution is one that has a relatively large amount of dissolved solute. A dilute solution is one that has a relatively small amount of dissolved solute.
How does the boiling point of a solution change with the amount of solute in solution?
The boiling point of a solvent will increase when a solute is dissolved in it. The elevation of the boiling point is directly dependent on the amount of solute present in the solution, but it is not based on the identity of the solute, so it is considered a colligative property.
Is the boiling point of a solution lower or higher than the freezing point of a pure solvent?
The boiling point of a solution is higher than the boiling point of a pure solvent, and the freezing point of a solution is lower than the freezing point of a pure solvent. For example, the boiling point of pure water at 1.0atm is 100oC while the boiling point of a 2% saltwater solution is about 102oC.
Why freezing point of solution is less than solvent?
Solutions freezing points are lower than that of the pure solvent or solute because freezing, or becoming solid, creates order and decreases entropy. Solutions have high entropy because of the mix of solvent and solute, so it takes more energy to decrease their entropy to the same point.