• (b) The ionisation of the.
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Ostwald's theory: This theory was proposed by Ostwald's in 1891.

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Acid-base indicators are either weak organic acids or weak organic bases.

(a) Quinonoid theory of indicators: (a) According to this theory, Acid base indicators are organic compounds with at least one benzene ring. .

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One form is termed benzenoid form and the other.

(ii) Quinonoid theory: According to this theory, (a) The acid-base indicators exist in two tautomeric forms having different structures. Jan 27, 2021 · 2) Quinonoid theory • According to quinonoid theory, an acid-base indicators exist in two tautomeric forms having different structures which are in equilibrium. Quinonoid Theory.

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Quinonoid/ Resonance theory. The color change in due to the interconversation of. Quinonoid theory: According to this theory: (a) The acid-base indicators exist in two tautomeric forms having different structures.

According to the quinoid theory, the acid/base indicators exist in tautomeric forms. .

One form is termed benzenoid form and the other quinonoid form.

THEORY OF INDICATORS: An indicator is a substance which is used to determine the end point in a titration.

THEORY OF INDICATORS: An indicator is a substance which is used to determine the end point in a titration. 1.

youtube. Mar 13, 2022 · This theory is also known as the benzenoid quinonoid theory.

It is based on Arrhenius theory.
There are two theories to explain the function of acid-base indicators.
May 23, 2023 · Ostwald, developed a theory of acid base indicators which gives an explanation for the colour change with change in pH.

The second theory, the Quinonoid theory, is based on the idea that acid-base indicators exist in two tautomeric forms (benzenoid and quinonoid), and these two forms have different colors.

Ostwald's theory: This theory was proposed by Ostwald's in 1891.

. . For example litmus solution or litmus paper.

Phenolphthalein and methyl orange test. . IDC-Online. Ostwald's theory This theory was proposed by. Acids, bases, and salts >.

one tautomeric form into other.

. Acids, bases, and salts >.

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Tautomeric forms usually arise due to the hydride ion shift.

Lesson 1: Introduction to acids and bases.

Quinonoid Theory : According to this theory the colour change of an acid-base indicator arises as a result of structural change.