The reaction 2A + B ⇄ 3C is at equilibrium. Initial concentrations: [A]=2 M, [B]=2 M. At equilibrium, [A]=1 M. Calculate the equilibrium constant Kc.
- 1.5
- 6.75
- 3.375
- 0.5
📝 Detailed explanation
Δ[A] = 2 - 1 = 1 M.Δ[B] = 0.5 M (since 2A:1B).
Δ[C] = 1.5 M (since 2A:3C).
Equilibrium: [A]=1 M, [B]=2-0.5=1.5 M, [C]=1.5 M.
Kc = [C]³ / ([A]² × [B]) = 1.5³ / (1² × 1.5) = 1.5² = 2.25.
Wait, 1.5³ = 3.375. 3.375 / 1.5 = 2.25.
Calculation check: Kc = 2.25.