Answer:
In Kc expression, the concentration of product is always placed at numerator while the concentration of reactant are place in denominator.
Explanation:
Kc is a equilibrium constant which is dependent on concentrations of reactants and products and is defined as.
Kc = [product]÷[reactant]
Consider a reaction
A + B ------> C + D
So its Kc expression will be as
Kc = [C].[D] ÷[A].[B]
Summary :
The concentrations of product are always place at numerator while concentration of reactant are place in denominator.