write down what are the chemical indicators
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write down what are the chemical indicators
Answer----✓
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. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.
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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.
Another type of indicator that may be encountered in chemistry and other sciences is a pointer or light on a device or instrument, which may show pressure, volume, temperature, etc. or the condition of a piece of equipment (e.g., power on/off, available memory space).
The term "indicator" comes from the Medieval Latin words indicare (to indicate) with the suffix -tor.