Chemistry (AS Level)·Equilibria · NSSCAS 2.3.1
Chemical Equilibria
Narrated lesson · press play
Many reactions don't go to completion — they reach a dynamic balance. Learn what dynamic equilibrium really means, how Le Chatelier's principle predicts the effect of changing temperature, pressure and concentration, how to write and calculate equilibrium constants Kc and Kp, and how the Haber and Contact processes choose their conditions as a compromise between yield and rate.
What you'll learn in this lesson
By the end you should be able to (NSSCAS Chemistry (AS Level) 2.3.1):
- Explain reversible reactions and dynamic equilibrium in terms of forward and reverse rates
- State Le Chatelier's principle and apply it to temperature, concentration and pressure changes
- State what does and does not change the value of the equilibrium constant
- Deduce expressions for Kc and Kp and calculate their values from data
- Calculate quantities present at equilibrium from appropriate data
- Explain the choice of conditions in the Haber and Contact processes as a yield–rate compromise
Loading your lesson…
You're watching a free 3-minute preview — create a free account to keep going.
Quick revision
Revise this in 5 minutes
Miss Rachel and Mike talk through the whole topic — with the figure and working drawn live.