for the equilibrium H2+CO2<-->H2O+CO

Question

Kc=3.18 at 1106K. if each of the four species was initially present at 3.000M calculate the equilibrium concentration of the CO at this temperature.....
OK I can get as far as equilibrium (final)
H2O=3.000-x
CO=3.000-xx
H2=3.000+x
CO2=3.000+x

substitute the equil.numbers into the KC expression and solve for x.Then add 3.000 or subtract x from 3.000 to arrive at individual concentration...

This is the bit I don't know how to do Could some one please go through it step by step please and show me how to get final answer...
Choices
0.844
3.268
3.844
3.460
2.156
Thanks Andy

Answer 1

see below at original post. I have two scenarios there
1. if you did not solve the equation.
2. if you did solve and obtained a value for x.

Answer 2

Dr bob,
can you check out my theory on previous post....thanx Andy