In: Chemistry
Carbonyl fluoride, COF 2 , is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride, CF 4 via the reaction 2COF 2 (g)⇌CO 2 (g)+CF 4 (g), K c =9.00 If only COF 2 is present initially at a concentration of 2.00 M , what concentration of COF 2 remains at equilibrium? Thanks! ( I keep getting .1 but that is incorrect)
2COF2 (g) ⇌ CO2 (g) + CF4 (g)
initial 2.00 0 0
change -2a +a +a
Equb 2-2a a a
Equilibrium constant, Kc = ([CO2 ][CF4 ]) / [COF2 ]2
9.00 = (a x a) / (2-2a)2
a = 10.857 M
Therefore the concentration of COF2 remain at equilibrium = 2-2a
= 2-(2x0.857)
= 0.29 M