Question

Alcohol with sodium iodide and orthophosphoric acid

Answer 1

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Replacing -OH by iodine. In this case, the alcohol is reacted with a mixture of sodium or potassium iodide and concentrated phosphoric(V) acid, H3PO4, and the iodoalkane is distilled off. The mixture of the iodide and phosphoric(V) acid produces hydrogen iodide, which reacts with the alcohol

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Answer 2

in this case alcohol feact with mixture of sodium iodidi and concentrated phosphoric acid(H2PO4) . the mixture of iodide and phosphoric acid produces hydrogen iodide which react with alcohol.