pHmérkkel
pHmérkkel is a term used in chemistry to describe a substance that changes color in response to variations in pH. These substances are typically weak acids or bases, and their color change is due to a reversible chemical reaction. When the pH of a solution changes, the equilibrium of this reaction shifts, leading to a change in the molecule's structure and thus its color.
Common examples of pHmérkkel include litmus, phenolphthalein, and methyl orange. Litmus, for instance, is a mixture
The specific pH range over which a pHmérkkel changes color is known as its transition range. This