AP Chemistry / Unit 7: Equilibrium
7.4 Calculating the Equilibrium Constant
Notes
Plug equilibrium concentrations (or pressures for $K_p$) into the $K$ expression.
Practice
$A\rightleftharpoons B$, at equilibrium $[A]=0.2$ M and $[B]=0.6$ M. $K=$
$\displaystyle \frac{0.6}{0.2}$.
$2A\rightleftharpoons B$ with $[A]=0.1$, $[B]=0.5$. $K=$
$\displaystyle \frac{0.5}{0.01}$.
You need which concentrations to find $K$?
$K$ is defined at equilibrium.
Ready for more? Take the Unit 7 test.