## Chemistry: The Central Science (13th Edition)

$K_{c} = \frac{[Ag+]^2}{[Zn^+2]}$ heterogeneous
The expression for Kc is the concentration of products raised to their respective stoichiometric coefficients divided by the concentration of the reactants raised to their stoichiometric coefficients. $K_{c} = \frac{[Ag+]^2}{[Zn^+2]}$ Here the Zn and the Ag are omitted since they are solids and you cannot have concentration of a pure solid. Since we have reactants in solid and aqueous phases, it is heterogeneous