When acid or base is added to water, the #pH# changes dramatically. Why, when acid or base is added to a buffer solution, does the #pH# change only marginally?
Because in distilled water, the effect of added acid/base is unmoderated. Buffers act to resist gross changes in
A buffer contains a weak acid and its conjugate base in appreciable quantities. The
If we use the buffer equation, we can appreciate this property:
At undergraduate level, you should be able to derive this equation. When the concentration of the acid is equal to that of the conjugate base,
In an unbuffered solution, added hydroxide or protium ion is free to express its concentration, and dramatic rises/falls in