00:01
Okay, so here we want to identify the characteristics of a good recrystallization solvent.
00:05
So we have five answer choices.
00:10
So let's go through each of them.
00:11
So number one, dissolves a chemical sample well at low temperatures.
00:15
So what we want for recrystallization is we want something to be insoluble in a solvent at low temperatures, but soluble at high temperatures.
00:23
So that way we can heat it up, dissolve it, and then when we cool it, the thing that we're trying to recrystallize crashes out of the solution.
00:30
So we actually want something that will dissolve.
00:32
Well at high temperatures, not low temperatures.
00:36
So number two, does not dissolve a chemical sample well at low temperatures? yes, that's what we wanted.
00:40
It's the opposite of choice one.
00:43
So then number three dissolves a chemical sample well at high temperatures.
00:47
This we do want, we just talked about it...