[samiam]

Find equilibrium expression of CO2(g) + H2(g)  <-> H2O(g) +CO(g)

given H2O(g) <-> H2(g) + 1/2O2(g)   K1= 4.0 x 10^-6
and 2 CO2(g) <--> 2CO(g) + O2(g)    k2= 1.3 x 10^-10

I think you reverse the first equation and so k1 value is inverted 1/k1 and than you find concentration of H2 and H20 from first equation.
and than divide the second equation by 2 or x 1/2 so you do k2^1/2
and find concentration of co2 and c0 and from this you can find equilibrium expression of target reaction.

B) a mixture of CO2, H2, H2O, and CO  concentration 2, 1 ,4 2 M all put in container , will CO2 tend to react as reaction proceeds toward equilibrium.
I do not know how to answer this.

[OrganicSynthesis]

For the first question, your steps so far seem correct. You're quite close to finding the equilibrium expression.

Try writing out the equilibrium expressions of the equations you have deduced, and see if you can make any substitutions to get the equilibrium expression you are looking for.


For the second question, try tackling it again once you have the first question. I think that without trivial knowledge, you have to solve the first problem to get the second one.

[narutodemonkill]

Find equilibrium expression of CO2(g) + H2(g)  <-> H2O(g) +CO(g)

given H2O(g) <-> H2(g) + 1/2O2(g)   K1= 4.0 x 10^-6
and 2 CO2(g) <--> 2CO(g) + O2(g)    k2= 1.3 x 10^-10

I think you reverse the first equation and so k1 value is inverted 1/k1 and than you find concentration of H2 and H20 from first equation.
and than divide the second equation by 2 or x 1/2 so you do k2^1/2
and find concentration of co2 and c0 and from this you can find equilibrium expression of target reaction.

B) a mixture of CO2, H2, H2O, and CO  concentration 2, 1 ,4 2 M all put in container , will CO2 tend to react as reaction proceeds toward equilibrium.
I do not know how to answer this.

oops yeah these two questions are related i did not notice than this question is simple.