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Question
What role does the molecular interaction play in a solution of alcohol and water?
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Solution
- Alcohol and water both have a strong tendency to form intermolecular hydrogen bonds.
- On mixing the two, a solution is formed as a result of the formation of H-bonds between alcohol and H2O molecules, but these interactions are weaker and less extensive than those in pure H2O.
- Thus, they show a positive deviation from ideal behaviour. As a result, the alcohol-water solution will have a higher vapour pressure and a lower boiling point than water-alcohol.
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