Reaction quotient Q vs K (Qc uses current concentrations; compare to Kc for direction)
jee-mainjee-advancedneet-ug
Qc uses current concentrations; compare to Kc for direction
What each symbol means
| Symbol | What it stands for |
|---|---|
| K_c | Equilibrium constant at that T |
| Q_c | Reaction quotient — same form as Kc but arbitrary snapshot |
When to use this
Same exclusion rules as Kc (pure solids/liquids omitted). If Q < K, forward; Q > K, reverse; Q = K, equilibrium.