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15 Ιουλ 2019 · 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.
1 Σεπ 2023 · Chemical Indicators Definition. Chemical Indicators are those chemical substances in which their presence in chemical reactions helps us to know whether the concentration of a chemical is ideal or not. Indicators are weak bases or weak acids that change in color of the solutions to reveal the characteristics of reactants as well as reactions.
30 Ιαν 2023 · 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.
Chemical indicators use one or more chemicals that undergo either a physical or chemical change, that is visible to the human eye, after exposure to predetermined critical parameters such as time, temperature and sterilant.
28 Ιουν 2023 · 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.
An indicator is a weak acid that ionizes within a known pH range, usually about 2 pH units. We can represent the protonated form of the indicator molecule as \(\ce{HIn}\) and the deprotonated form as \(\ce{In^-}\).
