4HCl+O2=2Cl2+H2O
Detremine the Kc expression for the reaction above by identifying what belongs in the numerator and what belongs int he denominator? pls do help trying to understand the concept but still confused.
K = (products)/(reactants) or
K = (RHS/LHS); i.e., right hand side and left hand side.
Remember coefficients become exponents.
To determine the equilibrium constant expression (Kc) for the given reaction:
4HCl + O2 -> 2Cl2 + 2H2O
The general expression is:
Kc = [Products] / [Reactants]
In the given reaction, the products are Cl2 and H2O, while the reactants are HCl and O2.
Therefore, the products (Cl2 and H2O) belong in the numerator and the reactants (HCl and O2) belong in the denominator.
Hence, the Kc expression for the given reaction is:
Kc = [Cl2]^2 * [H2O]^2 / [HCl]^4 * [O2]
To determine the Kc expression for a reaction, you need to understand the concept of equilibrium and the balanced chemical equation. The Kc expression is a way to represent the equilibrium constant for a reaction in terms of the concentrations of the products and reactants at equilibrium.
Let's break down the given balanced chemical equation:
4HCl + O2 → 2Cl2 + 2H2O
The coefficients in the balanced equation represent the molar ratios between reactants and products. In this case, we have 4 moles of HCl and 1 mole of O2 reacting to produce 2 moles of Cl2 and 2 moles of H2O.
In the Kc expression, the concentrations of the products are written in the numerator (top) of the fraction, while the concentrations of the reactants are written in the denominator (bottom).
Kc = [Cl2]^2 * [H2O]^2 / [HCl]^4 * [O2]
In this case, the concentration of Cl2 is squared because the coefficient in the balanced equation is 2. The same applies to the concentration of H2O.
On the other hand, the concentration of HCl is raised to the power of 4 because the coefficient is 4, and the concentration of O2 is not raised to any power since the coefficient is 1.
So, the Kc expression for the given reaction is:
Kc = [Cl2]^2 * [H2O]^2 / [HCl]^4 * [O2]
This Kc expression reflects how the concentrations of the products (Cl2 and H2O) and the reactants (HCl and O2) are related at equilibrium.