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Indicators used in acid-base filtrations...

Indicators used in acid-base filtrations are

A

Strong organic acids

B

Strong organic bases

C

Weak organic acids (or) bases

D

Non electrolytes

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An acid-base titration consists of the controlled addition of a dissolved base to a dissolved acid (or the reverse). Acid and base react rapidly to neutralize each other. At the equivalence point, equivalents of reacting substances are equal. The pH during a titration changes every time with a drop of titrant added, but the rate of this change varies enormously. A titration curve, graph of pH as a function of the volume of titrant, displays in detail how the pH changes over the course of an acid base titration. Significantly,the pH changes most rapidly near the equivalence point. The exact shape of a titration curve depends on the K_a and K_b, of acid and base. < The suitable indicator for this titration will be :

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