The acid and conjugate base each have different colors and as the equilibrium shifts from one direction to the other, the color of the indicator changes. As an example, the equilibrium of a weak acid ...

The acid and conjugate base each have different colors and as the equilibrium shifts from one direction to the other, the color of the indicator changes. As an example, the equilibrium of a weak acid ...

Some of these examples have been presented in a companion article on the physiological approach to acid–base balance by Berend ... The overall equilibrium between carbon dioxide and bicarbonate ...