Kostenloser Reaktions Quotient Rechner
Berechnen Sie reaction quotient Q und compare to K to predict reaction direction. Kostenloser chemistry Rechner.
Reaktionsquotient (Q)
0.0400
Reaction Quotient (Q) vs Concentration of Product C
Formel
## Reaction Quotient ### Formula **Q = [C]^c × [D]^d / ([A]^a × [B]^b)** Where: - **Q** = reaction quotient - **[X]** = current concentration of species X - **a, b, c, d** = stoichiometric coefficients Compare Q to K: - Q < K → reaction proceeds forward (toward products) - Q > K → reaction proceeds backward (toward reactants) - Q = K → system is at equilibrium
Lösungsbeispiel
A + B → C + D. Current: [A]=0.5, [B]=0.5, [C]=0.1, [D]=0.1. All coefficients = 1.
- 01Q = [C]^c[D]^d / [A]^a[B]^b
- 02Q = (0.1)¹(0.1)¹ / (0.5)¹(0.5)¹
- 03Q = 0.01 / 0.25
- 04Q = 0.04
Häufig Gestellte Fragen
What is the reaction quotient?
Q has the same form as the equilibrium expression but uses current (non-equilibrium) concentrations. It tells you which direction the reaction will shift to reach equilibrium.
How is Q different from K?
K uses equilibrium concentrations and is a constant at a given temperature. Q uses current concentrations and can have any value.
What if Q equals K?
The system is at equilibrium and no net change occurs. Concentrations remain constant (though individual forward and reverse reactions continue).
Lernen