Dimensionless concentration equilibrium constant
= Dimensionless concentration equilibrium constant
{title2=$K_c=\prod_i(c_i/c^\circ)^{\nu_i}$}
For ideal <concentration> activities and signed stoichiometric coefficients $\nu_i$, $K_c=\prod_i(c_i/c^\circ)^{\nu_i}$ at equilibrium. Its numerical value depends on the stated <standard concentration> when $\sum_i\nu_i\ne0$. Number concentrations require a number-concentration reference; molar concentrations require the corresponding molar reference.