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chemical indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution.
Chemical indicators create a visible sign (usually, a change in color) during they detect the presence of the threshold concentration of some chemical species like an acid, base, etc. This article shows detailed insight into chemical indicators, discussing their definition, examples, types, and various applications.
A chemical indicator is a substance that undergoes a distinct observable change when conditions in its solution change. This could be a color change, precipitate formation, bubble formation, temperature change, or other measurable quality.
Learn about the different types of chemical indicators (CIs), and how they are used in steam and vaporized hydrogen peroxide sterilization in this STERIS Knowledge Center article.
Indicators are weak acids or weak bases that show a change in color as the concentration of Hydrogen ions in a solution changes or the pH of a solution changes. The indicators dissociate slightly in the water to form ions. Some examples of indicators are Litmus, Turmeric, Phenolphthalein, etc.
Indicators are substances whose solutions change color due to changes in pH. These are called acid-base indicators. They are usually weak acids or bases, but their conjugate base or acid forms have different colors due to differences in their absorption spectra.
An indicator is a chemical compound that changes its colour in presence of an acid or base. Indicators are generally derived from plant pigments and are mildly acidic or basic in nature. Types of indicators. Natural indicators. For example red cabbage. Synthetic indicators. For example phenolphthalein. Olfactory indicators. For example onion.
Definition of Chemical Indicator. The chemical indicator is a substance that provides a clear sign or indication by a color change of the presence or absence of a threshold concentration of a chemical species such as an acid or base in a solution.
Chemical Indicators. These are observable chemical substances that detect the required concentration of a chemical species such as an acid or an alkali.
In chemistry, chemical indicators are substances that undergo a distinct observable change when exposed to certain conditions, often related to the presence of acids or bases. The most common change is a color shift, but olfactory indicators, which respond by altering scent, are also used.