ACid-base buffer reaction?

[SamuelTesla]

Quick question about buffers. So if I have a weak acid, and I add extra conjugate base - i have made a buffer of certain pH. But I don't understand how it works. Say I add strong base, the OH will react with the weak acid, reducing it's concentration and increasing the concentration of the conjugate base. This will cause the pH to increase.

But let's say there is only some weak acid in a solution. Using the acid-dissociation constant, we can find the concentration of H+ and conjugated base in that solution. When we add a strong base, the OH- can react with the strong acid, but it can also react with the H+ already in the solution... am I right?

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[loveoforganic]

Yeah. Those are both just ways of conceptualizing the reaction. There's no actual difference.