Why do we use the Henderson-Hasselbalch equation?

– It provides a quantitative relationship between pH, pKa, and the ratio of the concentrations of the conjugate base and the weak acid in a buffer solution. – It simplifies the calculation of the pH of buffer solutions, which is essential in various chemical and biological processes. – It helps in understanding the buffering capacity and the effect of adding acids or bases to the solution. – It is used in pharmaceutical sciences to predict the ionization state of drugs, which affects their absorption and excretion.