Question

The equilibrium constant, Kc, for the reaction N2O4 (g) ⇄ 2NO2 (g) is 0.211 at 100°C. If the equilibrium concentration of N2O4 is 0.00251 M, calculate the equilibrium concentration of NO2. View Available Hint(s) The equilibrium constant, Kc, for the reaction N2O4 (g) ⇄ 2NO2 (g) is 0.211 at 100°C. If the equilibrium concentration of N2O4 is 0.00251 M, calculate the equilibrium concentration of NO2. 2.65 × 10-4 M 0.0230 M 2.99 × 10-5 M 5.30 × 10-4 M

Answer 1

The concentration of NO₂ is 0,0230M

Step-by-step explanation:

The equilibrium constant, kc, express the ratio in equilibrium between products and reactants. For the reaction:

N₂O₄(g) ⇄ 2NO₂ (g) kc = 0.211 at 100°C

kc =
`([NO_(2)]^2)/([N_(2)O_(4)])`

In equilibrium:

0,211 =
`([NO_(2)]^2)/([0,00251])`

5,2961x10⁻⁴ = [NO₂]²

0,0230 M = [NO₂]

I hope it helps