Question

PLEASE HELP :-)

1.
at 1200°C Keq is 2.6' 10-3 for the dissociation of iodine molecules. L2(g) ⇔ 2I(g) If the equilibrium concentration of I2(g) is 0.95 mol/L, what is the concentration of I(g)?

2.
Sulfur dioxide is commonly formed by the burning of fossil fuels. It combines with additional oxygen to form sulfur trioxide. Write an equilibrium expression for the following reaction.
2SO2(g) + O2(g)  2SO3(g)

Answer 1

6.4 x 10^-7 = [CO]^2[O2]/ [CO2}^2 = ( 2.0 x 10^-3)^2 ( 1.0 x 10^-3)/ [CO2]^2 =
=4.0 x 10^-9 / [CO2]^2

[CO]= sq.rt ( 4.0 x 10^-9)/ 6.4 x 10^-7=7.9 x 10^-2 M


2.6 x 10^-3 = [I]^2 / [I2] = [I]^2 / 0.95
[I]= sq.rt ( 2.6 x 10^-3 x 0.95)=5.0 x 10^-2 M

Ksp = [Ba2+][CO32-] = ( 1.1 x 10^-4)^2=1.2 x 10^-8