Question

What is the function of a `"buffet"`, or rather a `"buffer"`?

Answer 1

A buffer solution moderates gross changes in solution `pH`.

Explanation:

A `"buffer solution"` is a mixture of a weak acid and it conjugate base in appreciable quantities. It acts to reduce gross changes in solution `pH`. Biochemical systems are extensively buffered.

For such a solution:

`pH=pK_a + log_10{[[A^-]]/[[HA]]}`

It is clear that at the point of half equivalence, i.e. `[A^-]=[HA]`, then `pH=pK_a`, because `log_(10)1=0`

On the other hand, a `"buffet"`, especially an all you can eat buffet, is where you go to stuff your face.