Question

For the equilibrium C2H2+2Br2⇌C2H2Br4 if the initial concentrations are [C2H2]=0.80 M,[Br2]=1.60 M,[C2H2Br4]=0.55 M , and the reaction proceeds in the forward direction until equilibration, where [C2H2]=0.60 M , what is the final concentration (in units of molarity) of C2H2Br4 ?

Answer 1

Ans. Create an ICE table with the given concentrations-

Now,

            Given, equilibrium [C₂H₂] = 0.60 M

We have, equilibrium [C₂H₂] = 0.80 – X                - in ICE table.

So,

            0.80 – X = 0.60

            Or, X = 0.80 – 0.60 = 0.20

Therefore, stoichiometric change in concertation, X = 0.20 M

# Using ICE table-     equilibrium [C₂H₂Br₄] = 0.55 + X

            Or, equilibrium [C₂H₂Br₄] = 0.55 + 0.20 = 0.75

Therefore, equilibrium [C₂H₂Br₄] = 0.75 M