Question

A 1L flask is filled with 1mol H2 and 2mol I2 at 448C. The value of the Kc is 50.5.
H2(g) + I2(g) -><- 2HI(g)

So it is asking for the Equilibrium concentrations of H2 I2 and HI.
I put the moles to M and set up an ICE Table
H2 + I2 -><- 2HI
I 1M 2M 0
C -x -x +2x
E 1-x 2-x 2x
Then i plugged the equilibrium numbers into the Kc expression Kc= [HI]^2/ [H2][I2] which was 50.1= 2x^2/(1-x)(2-x) and the two x's equal .96, and 2.16. However when i plug the x values back in H2=.04, I2= 1.04, and HI=1.92. When those values are plugged into the Kc expression

Answer 1

it does not equal 50.5