6 Consider the following equilibrium for the production of h

6. Consider the following equilibrium for the production of hydrogen chloride from its elements Kc=4.4 x 104 at 0°C Initially 1.50 mol of hydrogen and 1.50 mol of chlorine are injected into a 7.50x 10 Lrefrigerated reaction container that is cooled to O°C a. b. c. Find the concentrations of all entities at equilibrium. Calculate the amount of moles of each entity present at equilibrium. Calculate the reaction extent as a percent reaction.

Solution

             H2(g)     +   Cl2(g) -------------------- 2 HCl(g)

         1.50                1.50                              0

                -x                    -x                    +2x

         1.50-x                1.50-x                      +2x

      Kc= [HCl]^2/[H2][Cl2]

4.4x10^-4 = (2x)^2/(1.50-x)(1.50-x)

for solving the equation

x=0.0156

b)

at equilibrium

number of moles of H2= 1.50-x = 1.50 - 0.0156=1.484 moles

number of moles of Cl2= 1.50-x= 1.50 - 0.0156= 1.484 moles

nubmber of moles of HCl= 2x= 2x0.0156= 0.0312 moles

VOlume = 7.5x10^2L=750L

a)

at equilibroium

concentration of H2= 1.484/750=0.00197 M

concentration of Cl2= 1.484/750= 0.00197M

concentration of HCl= 0.0312/750 =0.0000416M=4.16x10^-5M