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Q1) The attraction between the host and analyte, and between the host and indicator, is electrostatic....

Q1) The attraction between the host and analyte, and between the host and indicator, is electrostatic. Explain what this means by drawing chemical structures of the host, analyte and indicator in ionised form. Why the analyte displaces the indicator molecule from the host molecule?

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Answer #1

ANSWER :-

  1. Let's consider the above mentioned reaction in which there is initial binding of the indicator (Catechol violet) to the analyte will be broken in the presence of a host such as EDTA which gets chelated in the presence of the zinc ion (analyte) to form a complex more strong than the one between a host and indicator and thus the released indicator will show a colour it shows in a free state that is blue.
  2. This is illustration showing how the affinity of the analyte and indicator changes in presence of a host showing interaction with host of an agent with maximum chelation ability.

Note :- Respected Sir/Madam, for any doubts please prefer communicating through comment section.

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