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Question
What happens when an alkyl iodide is heated with hydroiodic acid in the presence of red phosphorus?
Very Short Answer
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Solution
When an alkyl iodide is heated with hydroiodic acid (HI) in the presence of red phosphorus (P), it undergoes reduction to form the corresponding alkane.
\[\ce{\underset{Iodoethane}{CH3CH2I} + HI ->[Red P][]\underset{Ethane}{C2H6} + I2}\]
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