A compound that changes color when it is placed into an acidic or a basic solution is a compound that changes color when it is placed into an acidic or a basic solution is protonated. amphiprotic. an acid-base indicator. a buffer.

Compounds with these characteristics are called acid-base indicators. These substances, also called pH indicators are generally weak acids or bases, the ones who dissociate incompletely when dissolved in water, releasing only some of their hydrogen atoms in the solution. An example of a