IB Chemistry Definitions - Standard Level

Practise and master the definitions that correspond to the command terms define or distinguish used through out the IB Chemistry course.

1. The average mass of a molecule, calculated by adding the relative atomic masses of the constituent atoms

  • Relative Molecular Mass
  • Relative Atomic Mass
  • Atomic Number
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2. Measurements that have small systematic errors.

  • Accuracy
  • Outlier
  • Precision

3. The energy required to break a mole of covalent bonds in the reactant, all reactants and products being in a gaseous state.

  • Average bond enthalpy
  • Standard Enthalpy of Reaction
  • First Ionization Energy

4. Acid is an electron-pair acceptor

  • Strong Acid
  • Lewis Acid
  • Bronsted-Lowry Acid

5. A reaction that absorbs heat from the surroundings as a result of forming products with weaker bonds than the reactants.

  • Endothermic Reaction
  • Exothermic Reaction
  • Standard Enthalpy of Reaction


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