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Molecular Formula

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Question

Write the name and the structural formula of the compound formed when ethanol is heated at 443 K with excess of conc. $H_{2} S O_{4}$ . State the role of conc. $H_{2} S O_{4}$ in the reaction. Write chemical equation for the reaction.

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Solution

When ethanol is heated at 443K with excess of conc. $H_{2} S O_{4}$ , ethene ( $C H_{2} = C H_{2}$ ) is formed. This is a dehydration reaction where $H_{2} S O_{4}$ acts as a dehydrating agent by removing water and forming ethene.

$C H_{3} C H_{2} O H c o n c . H_{2} S O_{4} - ------ \to △, 443 K C H_{2} = C H_{2} + H_{2} O$

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Q. Question 39
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