You use the Henderson-Hasselbalch equation to calculate the pH of a buffer, and you can use MOLES of conjugate base and MOLES of weak acid in the "base over acid" section. Adding HCl will *increase* the amount of weak acid there is, and decrease the amount of conjugate base by the same amount.
These affect the ratio that is logged, so adding a little bit of HCl doesn't change the pH significantly.

Check me out: [ Ссылка ]

свернуть