Question

When you compare the pH after additions of drops of acid or basic solution with the pH of doing the same experiment in the presence of a buffer, what were the differences?

Answer 1

When you perform an experiment in the presence of a buffer at a particular pH and if the same experiment is performed after addition of drops of acid or basic solution in the same buffer, it does not affect the results of experiment or we can say their is no any major difference becuase buffer solutions resist changes in pH, even when strong acids or bases are added to the buffer solution. Buffer is a combination of a weak acid and its conjugate base, or a weak base and its conjugate acid. An example would be acetic acid combined with a water-soluble acetate compound, such as sodium acetate (CH?COONa). This combination creates an equilibrium system in which the acetic acid, the protons and the acetate ions are all present simultaneously in the same solution. Hence if there is no any major change in pH, it does not affects the results of the same experiment.