00:01
The ph range for which a buffer is effective is called the buffer range.
00:06
This range is from pca minus 1 to pka plus 1, where the pkk is referring to the weak acid component of the buffer.
00:30
This range is actually the range from where the ratio of conjugate base to weak acid goes from 1 tenth to 10.
00:49
So on the lower end of the range, we have 10 times as much weak acid as we have conjugate base.
00:58
And on the upper end of the range, we have 10 times as much conjugate base as we have weak acid.
01:06
The ph, this ratio here, is called the buffer component concentration ratio.
01:12
In order to get from the range of the buffer component concentration ratio to the range of the ph, we have to look at the henderson -hosselbach equation.
01:49
This equation is ph equals p -k -a plus the log of the buffer component concentration ratio, to the concentration of conjugate base to weak acid...