
Analytical chemistry 2, Lecture4 (the indicators)
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Science
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University
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Practice Problem
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Hard
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1.
FLASHCARD QUESTION
Front
What color does Methyl Orange turn in acidic media?
Back
Red
2.
FLASHCARD QUESTION
Front
What type of indicators are weak organic acids or bases with high molecular weight that change color according to pH?
Back
Color indicator
3.
FLASHCARD QUESTION
Front
How is the pH range of an indicator calculated?
Back
pH = pKIn + log [basic color] / [acidic color]
4.
FLASHCARD QUESTION
Front
What are the functional groups responsible for the color absorption of the indicator?
Back
Chromophore
5.
FLASHCARD QUESTION
Front
What color does phenolphthalein turn in acidic media?
Back
Colorless
6.
FLASHCARD QUESTION
Front
What is the role of an auxochrome in indicators?
Back
It modifies the color of the chromophore and enhances color intensity.
7.
FLASHCARD QUESTION
Front
Define 'chromophore'.
Back
A chromophore is a part of a molecule responsible for its color, typically due to the presence of conjugated double bonds.
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