posted by Wendy on .
For each titration of a buffer, how do i calculate how many mLs of titrant were required to obtain a 1.00 pH unit change from the initial pH?
It's difficult sometimes to understand when the questions are so general. Let me make an example. For a buffer in which pKa = 4.75 and pH = 4.75, we have
4.75 = 4.75 + LOg (base/acid)
and B/A = 1 or (base) = (acid).
Now if we change that to 5.75, then
5.75 = 4.75 + log (base/acid)
B/A = 10 or (base) = 10*(acid).
Since these are concns, and you know the mols, M = mols/L and solve for L.