How does the presence of a solute affect the freezing and boiling points of a solvent?

Answer 1

They usually lower freezing points, think antifreeze.

And salt water freezes at a lower temp than fresh, that is why they put salt on ice.

And they raise boiling points, think salt in water when making spaghetti.

Or, again antifreeze.

Answer 2

The presence of a solute in a solvent lowers the freezing point and raises the boiling point of the solvent. This is because the solute disrupts the formation of crystal lattices in the solvent during freezing and increases the boiling point by reducing vapor pressure. This phenomenon is known as colligative properties.

Answer 3

The addition of solutes to a nonvolatile solvent to a volitile solution causes an a boiling point elevation and a melting point depression, while also influencing osmotic pressures. These properties can be attributed to the solutes effects on the chemical potentials of the gaseous, liquid and solid phases.

Answer 4

Salt water has a different freezing point than regular water. Celsius was modeled after the freezing and boiling points of water and Fahrenheit was modeled after the freezing and boiling points of salt water. They are very different measuring scales which means that a solute(salt) can change the freezing and boiling points of a solvent(water).

Answer 5

Solvents can lower the freezing point by adding pressure to the solvent. When the solute expands, it adds to the pressure in the solvent. By adding pressure to the water, it lowers the freezing point. A solute can also lower the freezing point by adding more molecules to the number molecules that are already present in that solvent. This means that the number of molecules in the solute plus the molecules in the solvent makes the solution more dense which makes it take longer to freeze. For example, if you add salt to water, it will lower the freezing point. This is because the molecules in the salt were added to the molecules in the water.

Answer 6

Freezing points are depressed - think of the sea laden with salt - it does not freeze at 0 0C it is lower.

Boiling points are elevated - salt is often added to boiling water when cooking - it is NOT just for flavor

Answer 7

Raises boiling point and lowers freezing point
A non volatile solute in a volatile solvent increases the boiling point and decreases the freezing point.

Answer 8

solutes affect it by making freezing points lower and boiling points higher

Answer 9

A non volatile solute in a volatile solvent increases the boiling point and decreases the freezing point.

Answer 10

The freezing point is decreased and the boiling point is increased.