For the reaction: 2A(g) + B(g) ⇌ 3C(g), what is the correct expression for the e
Practice Questions
Q1
For the reaction: 2A(g) + B(g) ⇌ 3C(g), what is the correct expression for the equilibrium constant Kc? (2021)
[C]^3 / ([A]^2[B])
[A]^2[B] / [C]^3
[C]^3 / [A]^2
[B] / [C]^3
Questions & Step-by-Step Solutions
For the reaction: 2A(g) + B(g) ⇌ 3C(g), what is the correct expression for the equilibrium constant Kc? (2021)
Step 1: Identify the balanced chemical equation: 2A(g) + B(g) ⇌ 3C(g).
Step 2: Write the expression for the equilibrium constant Kc, which is based on the concentrations of the products and reactants.
Step 3: For each product, take its concentration and raise it to the power of its coefficient in the balanced equation. Here, C has a coefficient of 3, so we write [C]^3.
Step 4: For each reactant, take its concentration and raise it to the power of its coefficient. A has a coefficient of 2, so we write [A]^2, and B has a coefficient of 1, so we write [B]^1 (which can be omitted).
Step 5: Combine these parts into the Kc expression: Kc = [C]^3 / ([A]^2[B]).
Equilibrium Constant Expression – The equilibrium constant (Kc) is derived from the concentrations of products and reactants, raised to the power of their stoichiometric coefficients in a balanced chemical equation.
