00:02
Hi there.
00:03
This question is about colligative properties.
00:06
And a colligative property is a property of a solution.
00:13
So as we think about a solution, a solution is composed of a solute that is dissolved in a solvent.
00:24
And a colligative property depends only upon the number of solute particles that are present, not their identity.
00:47
So only the number of solute particles that are dissolved in solution, not what they are.
00:53
It doesn't matter what they are.
00:55
It just matters that these particles are present.
00:59
And the more particles you have, the more it increases that specific colligative property.
01:05
All right.
01:06
So as we look at our answer choices here, three of these are colligative properties and one is not.
01:12
Well, the first one we see there is boiling point elevation.
01:19
And that is a colligative property.
01:22
The more solute we add to a solvent, the higher the solvent's boiling point becomes.
01:33
The next one, vapor pressure, depression.
01:39
Well, this is why the boiling point is elevated, because the more solute you add, the more the vapor pressure of the liquid is depressed...