[fattylove]

Hi, I have this question in my text book that I don't understand how to solve.

We have this CO(g) + H2O(g) <=> CO2(g) + H2(g), and in a jar with constant(?) volume we add 0,7 mol CO, 0,6 mol H₂O and 0,1 mol of CO₂. When the jar has equilibrium there is 0,5 mols of CO₂.

A) Calculate the equilibrium constant.
I got that part it was easy, Equilbrium constant = 3,3

B) How much substance of water vapor do we need to add in the equilibrium, for the jar to contain 0,5 mol of H₂ in the new equilibrium state.

Sorry for my bad English.

[Hunter2]

Try to develop new equation. The value of hydrogen is known. The others you have to express with x. You get a square equation.