V = v - v' = kC1^{n1}C2^{n2} ... - k'C'1^{n'1}C'2^{n'2} ...

This is the most general expression of the law of chemical mass-action,

for the case of homogeneous systems.

Equating V to zero, we obtain the equation for the equilibrium state,

viz.

C1^{n1}C2^{n2} ... / C'1^{n'1}C'2^{n'2} ... = k / k' = K;