Question

1.a)concentrated sulphuric acid reacts with ethanol to produce ethene
(i) state the conditions for the reaction
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write the equation of the leads to formation of ethene In (a) (i) above.
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state the property of sulphuric acid shown in reaction (a)(ii)
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Answer 1

Answer: a) Temperature of $170^0C$

b) $C_2H_5OH\stackrel{conc H_2SO_4, 170^0C}\rightarrow C_2H_4+H_2O$

c) dehydrating agent

Explanation:

Ethanol is heated with an excess of concentrated sulfuric acid at a temperature of 170°C to produce ethene.

The balanced chemical reaction is:

$C_2H_5OH\stackrel{conc H_2SO_4, 170^0C}\rightarrow C_2H_4+H_2O$

Here concentrated sulfuric acid removes a water molecule from ethanol and thus acts as a dehydrating agent.