Carbonyl fluoride, cof2, is an important intermediate used in the production of fluorine-containing compounds. for instance, it is used to make the refrigerant carbon tetrafluoride, cf4 via the reaction 2cof2 (g) ⇌co2 (g) + cf4 (g), kc=8.90 if only cof2 is present initially at a concentration of 2.00 m, what concentration of cof2 remains at equilibrium?

Question

Hoffman

Chemistry

13 May, 21:35

Carbonyl fluoride, cof2, is an important intermediate used in the production of fluorine-containing compounds. for instance, it is used to make the refrigerant carbon tetrafluoride, cf4 via the reaction 2cof2 (g) ⇌co2 (g) + cf4 (g), kc=8.90 if only cof2 is present initially at a concentration of 2.00 m, what concentration of cof2 remains at equilibrium?

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Kamron · Answer 1

Answer is:concentration of COF₂ remains at equilibrium is 0,503 M.

Chemical reaction: 2COF₂ ⇄ CO₂ + CF₄.

c₀ (COF₂) = 2,00 M.

Kc = 8,90.

[CO₂] = [CF₄] = x; equilibrium concentration.

From chemical reaction: n (COF₂) : n (CO₂) = 2 : 1.

[COF₂] = 2 · [CO₂] = 2x

Kc = [CO₂] · [CF₄] / [COF₂]².

Kc = x² / (2-x) ².

8,9 = x² / (2-x) ², square root formula.

2,98 = x / 2-x.

5,96 - 2,98x = x.

x = 1,497 M.

[COF₂] = 2,00 M - 1,497 M = 0,503 M.