00:01
To draw the titration curve for cysteine, we need to know what the pka values are.
00:10
Ph will be equal to, i'm sorry, ph will be plotted as a function of the volume of base.
00:18
And we've got one equivalent base, two equivalent space, and three equivalent space.
00:32
So our curve is going to look something like this, where at each equivalent we see a dramatic rise in ph.
00:48
And so here we're going to have the three equivalence points.
00:58
So they're calling these, indicate the ph, where the ph is equal to the pka of the functional groups, and where the titration endpoints are.
01:09
So these three are the endpoints, and these three phs correspond to the pkas.
01:25
So this is where ph equals pka1...