00:01
So we have this graph, which is essentially linear.
00:06
The increase in the delta t .f, the freezing point depression, appears perfectly linear with the molality of both solutes.
00:22
If you go back and look at figure 1121, it shows the effect of increasing concentration.
00:31
Of ionic solutes, the higher the concentration, the greater the tendency for the ions in the solution to form ion pairs.
00:40
And if you have two ions together, then that acts as one particle.
00:45
And so if this were an ionic solute, if either of them were an ionic solute, we would expect the curve to be tapering off, not to have a constant slope, but for the slope to become less and less as the concentration increases.
01:04
So basically it's the fact that there's no decrease in slope at high molality that tells you that these are not electrolytes...