Question

The equilibrium constant, Kc. for the following reaction is 1.29×102 at 600 K. COC12(g) = CO(g) + Ch(g) Calculate the equilibrium concentrations of reactant and products when 0.305 moles of COCL() are introduced into a 1.00 L vessel a 600 K CoC] Co]
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Answer #1

concentration of CoCl2= moles/Volume in L=0.305moles/1L=0.305M

the reaction is CoCl2(g)<------>Co(g)+Cl2(g)

preparing the ICE table and noting that =x concentration of CO ( or Cl2) at equilibrium

                                             initial (M)                      change                     equilibrium

CoCl2                                    0.305                              -x                              0.305-x

Co                                            0                                    x                              x

Cl2                                           0                                     x                             x

K= Equilibrium constant = x2/(0.305-x)= 1.29*10-2,when solved using excel, x=0.0566

hence at Equilibrium, [Co]=[Cl2]=0.0566 and [CoCl2]=0.305-0.0566=0.2484M

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