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11y ago

An indicator is a type of chemical which will change color under specified circumstances, which creates a visual cue that chemists can use. There are many different kinds of indicators. Ferric oxide, for example, will turn red in the presence of the cyanide ion.

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11y ago

Indicator is a chemical compound that changes its color (colors) according to pH of a solution. The number of active substances in an indicator mixture defines the sequence and colors at given pH.

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11y ago

An indicator is a chemical compound which change the color depending of the value of the pH.

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Q: What is an indicator and what does it tell us?
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An indicator, for example Litmus.


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