• An addition reaction is a reaction in which an atom or molecule is added to an unsaturated molecule, making a single product.
  • Addition reactions are useful ways to introduce a new functional group into an organic molecule.
  • Hydration reactions can take place when the alkene and water are heated to near 100°C in the presence of a strong acid, which acts as a catalyst.
  • A monosubstituted alkyl halide can be produced by the addition of a hydrogen halide to an alkene.
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