00:03
So to find the pca of a weak acid from its titration curve, i'm first going to write out a general equation for the neutralization of a weak acid, ha.
00:15
It will go to a conjugate basic ion, a minus, and the acidic ion h3o plus.
00:24
And from a titration curve of a weak acid, we can get two basic helpful pieces of information.
00:31
Here i have the volume of the base added on the x -axis and the ph of the solution on the y -axis.
00:40
And the titration curve of a weak acid might look something like this with the equivalence point, the first piece of information here, and the half -equivalence point, the second piece here.
00:53
And at the equivalence point, we know that all of the acid, ha, has been converted into its conjugate base, minus because the ph is basic.
01:05
But at the half equivalence point, exactly half of the acid has been converted to base...