Free Reaction Quotient Calculator
Calculate the reaction quotient Q for a reaction aA + bB -> cC + dD to determine reaction direction relative to equilibrium.
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Reaction Quotient (Q)
0.1333
log10(Q)-0.8751
Reaction Quotient (Q) vs Concentration of C [C]
Reaction Quotient (Q)
The reaction quotient has the same mathematical form as the equilibrium constant but is evaluated at non-equilibrium concentrations.
Formula
Q = [C]^c [D]^d / ([A]^a [B]^b)
Compare Q to the equilibrium constant K:
Example Calculation
For A + B -> C + D with [A]=0.5, [B]=0.3, [C]=0.1, [D]=0.2 M.
- 01Q = [C][D] / ([A][B])
- 02Q = (0.1 × 0.2) / (0.5 × 0.3)
- 03Q = 0.02 / 0.15 = 0.1333
Frequently Asked Questions
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