Water Removal
Hardchemistry
Azeotropic distillation uses an added component primarily to:
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Solution
Incorrect! Answer:
Form a lower-boiling azeotrope to remove water
- Definition: An azeotrope is a liquid mixture that boils at a constant temperature and has the same composition in the liquid and vapor phases.
- The Problem: Ethanol and water form an azeotrope at 95.6% ethanol, meaning simple distillation cannot produce absolute (100%) ethanol.
- Azeotropic Distillation: An 'entrainer' (e.g., Benzene) is added.
- New Azeotrope: The entrainer forms a new ternary azeotrope (benzene-water-ethanol) with a lower boiling point.
- Function: This azeotrope distills off first, efficiently removing the water. The remaining benzene is then removed as a binary azeotrope, leaving behind absolute ethanol.
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About This Question
- Subject
- chemistry
- Chapter
- purification techniques
- Topic
- water removal
- Difficulty
- Hard
- Year
- 2025
This hard difficulty chemistry question is from the chapter purification techniques, covering the topic of water removal. It appeared in the 2025 exam. Practice this and similar questions to strengthen your understanding of purification techniques concepts.
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