For the teaction system, 2SO2(g) + O2(g) <--> 2SO3(g), Kc has a value of 4.62 at 450.0K. A system, at equilibrium, has the following concentrations: [SO3] = 0.254 M, [O2] = .00855 M. What is the equilibrium concentration of SO2(g)?

The correct answer is 1.28M, but I don't know how to get there. What I did was : Kc = SO3^2/SO2^2 x O2^2, 4.62 = .254^2/SO2^2 x .00855 and got 1.63 for SO2. Am I missing anything?

2 answers

1.63 is [SO₂]²

... take the square root
hahahaha... thank you so much scott