[ziagemini]

Hello All,

Lately i am working a lot with respect to Buffer capacity. But there is a basic question that i am confused about. Now in order to know buffer capacity we always look at the BC curve, and from that we say the higher buffering capacity is around the pka of acid. So that means if i have to write buffer capacity of any acid numerically it would be the value of the peak. Like if you look at the figure on this page:

http://www.chembuddy.com/?left=pH-calculation&right=pH-buffer-capacity

The buffer capacity of the acetic acid would be 0,055 mol-eq/L/pH. Is my thinking correct or there is something else.

Hope to have some clarification from the experts on this forum.

Regards!

[Borek]

if i have to write buffer capacity of any acid

Buffer capacity is a property of a buffer solution, not an acid. I am not sure what you are aiming at.

[ziagemini]

Ohhh,

Again i write confusing statement. Lets say i have acetic buffer similarly as in the diagram. Then??

Regards!

[Borek]

Peak says what is the maximum possible buffer capacity of a given buffer solution, not what is the real capacity of the buffer you are using - as the real value is a function of pH. (I assume concentration to be a property of a given buffer solution).

I am still not sure what the question is.