00:03
Hi there.
00:04
In this question, we are trying to calculate molality from a solution's molarity.
00:10
So let's talk about each of those first.
00:13
Mularity, abbreviated with a capital m, is defined as moles of solute per liter of solution.
00:32
While molality, abbreviated with a lowercase m, is moles of solute per kilogram of solvent.
00:56
Okay, so we have the molarity, which means we have the moles of the solute, and we need moles of solute for the molality.
01:10
So we already have that.
01:12
We also are given a liter of the solution.
01:20
Well, we need to get to the mass of the solvent.
01:24
So the first thing we would need to do is to get to the mass of the solution.
01:28
And we can do that by multiplying by the density, or using the density as a conversion.
01:36
Factor because density is mass over volume.
01:40
So this would give us the mass of the solution, but we need the mass of just the solvent.
01:51
So in order to get the mass of just the solvent, we would have to remember a solution is composed of a solute and a solvent...