HI All!!!
Today i've studied the buffer solution but i have some doubts looking this graph:
Before, i thought that a buffer solution was a weak acid/conjugate weak base solution...
But seeing this graph i can see that the Buffer capacity is also good at pH<2 (or on pH>10).
But usually only a strong acid can give a pH value of 2 or less....SO
1) a strong acid solution could be a "buffer solution???
2)if it can, WHY ??!!
Because when i add some strong base (NaOH) to the solution of HCl there is the neutralization reaction(H+ +OH- ---> H2O) and the concentretion of hydrogen ion decrease quickly...so the pH change!!!
I don't understand this fact...
Someone can explain it??
Thanks a lot.