00:01
Okay, this is session 72 at the end of chapter 11 in chemistry, the science, and context.
00:08
And it is asking for the molality of a non -volatile, non -electrolite solute.
00:17
Okay, so that means that it is non -volatile, and it is, when they say non -electrolite, they're saying that it does not dissociate, okay? and needed to increase the boiling point by 7 .6 degrees celsius.
00:35
So when we're talking about increasing a boiling point, we're talking about the delta tb.
00:41
Delta tb is the boiling point elevation, okay? the amount that we are increasing a boiling point due to the presence of a non -volatile solute.
00:52
And the reason why they're mentioning a non -electrolite, so i should have written that here, a non -electrolite, okay, is that they want us to know that i, which is our vant hough factor, right? they want us to know that the vant -haw factor is one, okay? so electrolytes, so let's say nacl, nacl is an electrolyte, it will dissociate into n -a -plus and the c.
01:24
L minus, okay? and so i equals two in this case.
01:28
Okay, but since we are thinking of a non -electrolite molecular compound, then we don't have to worry about the vant hof factor...