1. Carbonyl fluoride, COF2, is an important intermediate used in the production

Question

1. 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=6.40

If only COF2 is present initially at a concentration of 2.00 M, what concentration of COF2 remains at equilibrium?

Express the molar concentration numerically.

2. Consider the reaction

CO(g)+NH3(g)?HCONH2(g),    Kc=0.860

If a reaction vessel initially contains only CO and NH3 at concentrations of 1.00 M and 2.00 M, respectively, what will the concentration of HCONH2 be at equilibrium?

Express the molar concentration numerically.

Explanation / Answer

let the final concnetration of COF2 be x.so,

used up=2-x

so [CO2]=0.5*(2-x)

[CF4]=0.5*(2-x)

so,

6.4=(0.5*(2-x))^2/(x^2

or x=0.33 M

b)lety the dissociation be x.,so,

0.86=x/((1-x)*(2-x))

or x=0.55 M=[HCONH2]

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