00:01
So the key here is that we're looking for anions that are conjugate bases of weak acids.
00:07
And so we want to identify the anion in all of these species.
00:12
And if the anion is the conjugate base of a weak acid, that means its solubility is going to be higher than what's calculated.
00:20
And i'll do one out so you can see exactly what's going on.
00:23
The anion in this first one is s .o3 -2 -1.
00:28
Its conjugate acid is h2 -s -o -3.
00:34
That is a weak acid, so it is going to have a higher solubility than what you would calculate from ksp.
00:41
Let's just look at the mechanism behind that here.
00:45
So if we have co -s -o -3, that dissolves into cobal.
00:54
It's going to be equilibrium because it's slightly soluble.
00:57
Cobalt and sulfite.
01:00
Now this sulfite is a weak base, so it will interact with water.
01:07
So you're going to have sulfite plus water gives you h2s -o -3 plus hydroxide...