Answer to Question #152117 in Chemistry for Alexis

Question

For the equilibrium 2 SO3(g) ↔ 2 SO2(g) + O2(g), Kc=4.08x10-3 at 1000K. Write the equilibrium expression then solve for O2 if the equilibrium amounts are SO3(g) = 1.25M and SO2(g) = 0.0750M.

Answer 1

Solution:

The balanced chemical equation:

2SO₃(g) ↔ 2SO₂(g) + O₂(g)

The equilibrium expression for the reaction system:

For [O₂]:

K_c = 4.08×10^-3

[SO₃] = 1.25 M

[SO₂] = 0.0750 M

Substitute the known equilibrium concentrations and K_c into the expression and solve for [O₂]:

Answer: [O₂] = 1.13 M.