Answer to Question #122101 in Chemistry for han

Question

Kc = 57.0 at 700 K for the reaction shown below, which is conducted in a high pressure reactor. H₂(g) + I₂(g) ⇌ 2 HI(g). If [H₂(g)] = [I₂(g)] = 0.200 M at equilibrium, the molar concentration [HI((g)] = ________ at equilibrium

Answer 1

[H₂] = [I₂] = 0.200 M

K_c = 57.0

Solution:

The balanced chemical equation:

H₂(g) + I₂(g) ⇌ 2HI(g)

The equilibrium expression for this reaction:

Therefore,

[HI]² = [H₂] × [I₂] × K_c

[HI]² = (0.200 M) × (0.200 M) × (57.0)

[HI]² = 2.28 M²

[HI] = (2.28 M²)^0.5 = 1.51 M

[HI(g)] = 1.51 M

Answer: 1.51 M is the molar concentration of HI at equilibrium.