What are the "Universal" buffer mixtures?
Universal buffer mixtures are mixtures of buffers.
No, that's not a facetious answer.
A buffer is a mixture of a weak acid and its conjugate base (or vice versa).
It has its best buffering capacity in the range of
If you combine substances with
Citric acid is a useful component of a buffer mixture because it has three
If you add another acid such as
By adjusting the relative amounts of
The mixture is called a universal buffer.
If you add more acids like diethylbarbituric acid (