00:01
We know that depression in freezing point, that is delta tf, so this depression in freezing point is directly proportional to the molality of the solution or we can further light it as delta tf is equal to kf, this is the moral depression constant multiply by molality.
00:36
So, also we have another colligative property.
00:44
This is the colligative property for depression and freezing point.
00:48
So colligative property means that the property of the property which depends on the number of particles of solute.
00:55
So the greater the number of particles of solute, greater the value of the colligative property.
01:00
So depression and freezing point is a colligative property which is directly proportional to the molality of solution and removing this proportionate.
01:09
The sign we will get kf that is the moral depression constant so consider it as equation one now we have another collicative property that is osmotic pressure pi pi is equal to molarity multiplied by r t so actually the actual equation is this pi is equal to c rt this is the actual equation.
01:47
So here this c is the molar concentration or molarity.
01:52
So that's why i'm writing here molarity.
01:54
Okay.
01:56
So now as given in the question, as this is given in the question, that we can assume the molarity as molality.
02:15
So this is molality is equal to molarity...