Why do acid and alkaline solutions get colorful when exposed to indicators?
In: Chemistry
It is the indicator molecule that changes colour based on pH (presence and concentration of acids and bases) of the solution. Indicators are complex organic molecules with a finely balanced system of different bonds. This system is balanced in such a way that a molecule absorbs a specific wavelength of light and so appears in a specific colour. When pH of solution changes, because some acid or base is added, indicator molecule may also lose or receive a hydrogen atom. This changes the balance of the molecule, making it absorb a different wavelength, and appear in different colour.
Latest Answers