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The relationship between pKa for an acid-base indicator and the pH at which it changes colour.

What is the relationship between the pKa for an acid-base indicator and the pH at which the indicator changes colour?

pH=?

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The pKa of the compound is actually log(Ka), where Ka is the acid dissociation constant of that compound. Let's consider HIn to be our indicator. Usually indicators are weak organic acids or weak organic bases whose undissociated form has a different colour than the conjugate ...

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The solution answers the question in step-by-step format in 100-150 words.

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