Ionization of acids and bases

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Dhamnekar Winod
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Ionization of acids and bases

Post by Dhamnekar Winod »

Certain water soluble organic compounds like phenolphthalein and bromothymol blue behave as weak acids and exhibit different colours in their acid (HIn) and conjugate base \((In^-)\) forms.
\(HIn(aq)_{\text{acid Indicator Colour A}} + H_2O(l) \rightleftharpoons H_3O^+(aq)_{\text{Conjugate acid}} + In^–(aq)_{\text{Conjugate base Colour B}}\)

Such compounds are useful as indicators in acid-base titrations, and finding out \(H^+\)ion.

In the aforesaid chemical equation, what is the meaning of In?
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ChenBeier
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Re: Ionization of acids and bases

Post by ChenBeier »

In means Indicator. In- is the anion of indicator.
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