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 ...

for example the reactions with metals and metal carbonate. Carboxylic acids are weak acids, and will react more slowly than other, stronger acids like hydrochloric acid. A carboxylic acid is an ...