Answer:
1. Kc = [Ba2+][SO42-]
2. Kc = [CH3COO-][H3O+]/[CH3COOH]
Step-by-step explanation:
The equilibrium constant expression for Kc is the product of the concentrations of the products raised to their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients.
1. For the first equilibrium, BaSO4(s) <---->Ba2+(aq) + SO42-(aq), the equilibrium constant expression for Kc is: Kc = [Ba2+][SO42-].
2. For the second equilibrium, CH3COOH (aq) + H2O (l) <—>CH3COO- (aq) + H3O+ (aq), the equilibrium constant expression for Kc is: Kc = [CH3COO-][H3O+]/[CH3COOH].
Note that the concentration of water is not included in the expression because it is a pure liquid and its concentration is considered constant.