BRAINCAKE

Formulae

OCR A-level ChemistryTopic 9 of 265 lessons

Revision notes for Formulae in OCR Chemistry A (H432). Every lesson in BrainCake comes with R.E.C.I.P.E. recall steps, a quick check and spaced reviews.

  1. Functional GroupA functional group is an atom or group of atoms that is responsible for the characteristic chemical reactions of a compound.
  2. Homologous SeriesA set of compounds with the same functional group and similar chemical properties which differ by the addition of a -CH2 group.
  3. General FormulaThe general formula is the simplest algebraic formula of a member of a homologous series.
  4. Types of FormulaeDisplayed Formula This shows every atom and every bond separately.
  5. Empirical and Molecular FormulaThe empirical formula shows the simplest whole-number ratio of atoms of each element in a compound.

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