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Question
How would you convert ethene into ethane?
Solution
The two hydrogen atoms are added to the unsaturated molecule, turning it into a saturated one, when ethene and hydrogen are passed across finely split catalysts like nickel at 200°C or platinum or palladium at room temperature.
\[\ce{\underset{Ethene}{C2H4} + H2 ->[200^\circ C][Ni] \underset{Ethane}{C2H6}}\]
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