# How can I find the equilibrium constant without concentrations?

Jul 11, 2018

Just to retire this question...

#### Explanation:

We can use the (extensively tabulated) $\text{Gibbs Free Energy}$...

...where $\Delta {G}_{\text{reversible"^@=-RTlnK_"eq}}$....

Or the equilibrium can be directly measured....which of course requires knowledge of concentrations...

$A + B r i g h t \le f t h a r p \infty n s C + D$

${K}_{\text{eq}} = \frac{\left[C\right] \left[D\right]}{\left[A\right] \left[B\right]}$