Answer:
The Henderson-Hasselbalch equation is a chemical expression useful to preparate buffers solutions.
Step-by-step explanation:
The Henderson-Hasselbalch equation is a chemical expression very useful to calculate the pH of a buffer knowing the ratio of the acid to base, or to calculate the concentration needed of the acid and the conjugate base for certain pH.
The equation is:
![pH = pKa + Log ([A^(-)])/([HA])](https://img.qammunity.org/2020/formulas/chemistry/college/h23q38hauy5mr0bhs3cx268nmalx27fufk.png)
where [A^{-}] is the concentration of the conjugate base, [HA] is the concentration of the acid and pKa is the negative logarithm of the acid dissociation constant ( pKa = -Log (Ka) )