00:01
In this video, we're going to calculate the molality of a sodium chloride solution.
00:05
We are told that we have 6 .58 grams of nacl in 250 milliliters of water.
00:16
And we want the grams to turn into moles of nicl, and we want the milliliters to turn into kilograms of h2o.
00:27
So we get moles per kilogram.
00:29
So to address our first point, if we put grams of nacl on the bottom and moles on the top, then we can convert grams to moles.
00:40
Grams will cancel out, and we know the relationship by the molar mass.
00:43
One mole is 58 .45 grams.
00:49
Now, our second point, we want the millilators to turn into kilograms.
00:52
Well, we know that the density of water is one gram per milliliter...