Year 12 Chemistry

Module 5 | Equilibrium and acid reactions

Content 3: Calculating the equilibrium constant (K_eq)

Lesson 1 | The equilibrium expression K_eq

• deduce the equilibrium expression (in terms of K_eq) for homogeneous reactions occurring in solution (ACSCH079, ACSCH096)

• perform calculations to find the value of K_eq and concentrations of substances within an equilibrium system, and use these values to make predictions on the direction in which a reaction may proceed (ACSCH096)

• qualitatively analyse the effect of temperature on the value of K_eq (ACSCH093)

Lesson 2 | Investigation to determine K_eq

• conduct an investigation to determine K_eq of a chemical equilibrium system, for example:
  – K_eq of the iron(III) thiocyanate equilibrium (ACSCH096)

Lesson 3 | Use of K_eq in chemical reactions

• explore the use of K_eq for different types of chemical reactions, including but not limited to:
  – dissociation of ionic solutions
  – dissociation of acids and bases (ACSCH098, ACSCH099)

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