Heating an alcohol in the presence of sulfuric or phosphoric acid will cause a dehydration to occur: the removal of the elements of water from a molecule, forming an alkene. The reaction usually follows an E1 mechanism. The \( \mathrm{S}_{\mathrm{N}} 1 \) pathway is suppressed, both by heating the reaction mixture (more energy promotes the elimination pathway) and by using a strong acid whose conjugate base is a poor nucleophile.
: 2 : See Periodic Table
See Hint
i. Draw curved arrow(s) to show how the alcohol reacts with phosphoric acid.
