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 simplest whole number ratio of the atoms a compound contains.

  • Empirical Formula
  • Molecular Formula
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2. The liquid that dissolves another substance or substances to form a solution

  • Solute
  • Solvent
  • Solution

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

  • Standard Enthalpy of Reaction
  • Endothermic Reaction
  • Exothermic Reaction

4. The tendency of an atom in a molecule to attract a shared pair of electrons towards itself.

  • Electronegativity
  • First Ionization Energy
  • Electron Affinity

5. A homogeneous mixture of a solvent with a solute - there is usually some interaction between the solvent and solute molecules

  • Solute
  • Solution
  • Solvent


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