Weak Base Equilibrium and Kb
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
A weak base reacts only partially with water, and Kb measures how far that equilibrium favors the protonated base and hydroxide over the intact base.
Show
Ammonia's Kb expression is [NH4+][OH−]/[NH3], describing NH3 + H2O ⇌ NH4+ + OH−.
Watch for
Kb describes a base reacting with water, a different equilibrium from the Ka of its own conjugate acid, related but not identical.