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i want to know about the resonance theory of indicators. please help me

i want to know about the resonance theory of indicators.
please help me

Grade:12th Pass

1 Answers

Naveen Kumar
askIITians Faculty 60 Points
8 years ago
So Do you want to kknow the color change taking place at different pH value ?
The indicators are aromatic compounds which exsit in two form called Banzenoid form and quinonoid form. these exist in equilibrium and depending on pH one form dominates on other and their colour of dominatiing form appear in the solution.

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