## Chemistry: The Molecular Science (5th Edition)

$$K_c = [CO_2]$$
$$K_c = \frac{[Products]}{[Reactants]}$$ $$K_c = \frac{[CO_2]}{1} = [CO_2]$$ ** Since $CaCO_3$ and $CaO$ are pure solids, we do not put them in the equation for $K_c$.