00:01
So there is this statement that like dissolves like, and what they mean by that is whatever molecules share similar intermolecular forces, they are attracted to each other and dissolve in each other.
00:21
So the like is similar intermolecular forces, which result in similar polarities.
00:40
Non -polar dissolves non -polar, highly polar dissolves highly polar, hydrogen bonding, dissolves hydrogen bonding, and so forth.
00:52
So they tell us that cyclohexane is non -polar.
00:57
So which of the following would be more soluble in cyclohexane, a species that is non -polar, than water, which you need to know, is polar.
01:09
So any species that is non -polar, such as hydrocarbons, hydrocarbons are species that contain only carbon and hydrogen, and they are non -polar.
01:25
So this species is non -polar.
01:28
The next one is ch2o, which actually looks like this for mildehyde.
01:37
And we see a difference in electronegativity between carbon and oxygen, and so this ends up being polar due to the polarity of the co bond, and then we've got nh4, which, nope, we've got nh3, which has a lewis structure that looks like this, and so the geometry doesn't allow for bond polarity cancellation, so we have a partial negative on the nitrogen and partial positives on the hydrogen and in addition to it being polar it exhibits hydrogen bonding just like water does hydrogen bonding occurs when hydrogen is bonded to a nitrogen oxygen or fluorine here it's bonded to a nitrogen in water it's bonded to an oxygen...