In this instalment of A Level Chemistry, award-winning science educator Dr David Boyce introduces the equilibrium constant, Kc.
We formally derive and explore the expression used to calculate Kc, examine how equilibrium concentrations are used in calculations, and discuss why some equilibrium constants have units while others do not.
Using clear worked examples and industrial case studies such as the Haber process, we investigate what it means when:
• (Kc greater than 1) — products are favoured
• (Kc less than 1) — reactants are favoured
• (Kc = 1) — neither side is strongly favoured
This video is ideal for A Level Chemistry students revising chemical equilibria, preparing for exams, or developing a deeper understanding of physical chemistry calculations and equilibrium behaviour.
