00:01
With solution chemistry and more specifically we're looking at the freezing point and the boiling point.
00:05
However firstly we need the molality of the solution.
00:09
So we have the moles of s8.
00:14
So this is equal to 0 .0 .0 312 moles and then we can calculate the malality.
00:22
So that is the moles divided by the volume of the solvent that we have.
00:30
However, we need to be concerned with the mass in kilograms.
00:32
So that's 100 times 10 to the minus 3.
00:37
What we get is 0 .0 .0312 for the molality of s8.
00:46
So now we can calculate the freezing point depression using the equation delta t f is equal to kfcm.
00:55
So that is equal to 3 .59 degrees c multiplied by nought .0 .312, which is the value we just calculated to get nought .0312, which is the value we just calculated to get 0 .59 degrees c, 0 .112 degrees c.
01:09
So then we take 16 .60.
01:14
Takeaway 0 .112...