ethanolhydrogen iodide⟶ΔiodoethanewaterThis is a "Bimolecular Nucleophillic Substitution (SN2)"-reaction.Same reagentsethanol + hydrogen iodide → ethane + iodine + waterPotentially competingDissociation of hydrogen iodide in waterethanol → ethene + waterethanol + hydrogen iodide → ethane + iodine + waterAutodissociation of waterLessonsSubstitution Reactions of Alcohols