Question

For the reaction of carbon with carbon dioxide to make carbon monoxide, one set of conditions produced a Kc = 1.2 × 10-1. At equilibrium at a certain temperature, the concentration of product was 0.60 M. What was the concentration of carbon dioxide at that temperature? C(s) + CO2(g) ⇌ 2CO(g)

Answer 1

[CO₂] = 1.73

..........

Answer 2

[CO₂] = 1.73

Step-by-step explanation:

C(s) + CO2(g) ⇌ 2CO(g)

Remember in equilibrium, we work with [M]. The expression for Kc is this one:

Kc = [CO]² / [C] . [CO₂]

[C] = x

[CO₂] = x

1.2 x10⁻¹ = 0.60² / x²

x² = 0.60² / 1.2 x10⁻¹

x² = 3

x = √3 = 1.73