# Thread: Equilibrium concentrations?

1. I would really appreciate it if someone could set me in the right path for solving this question!

Original:
SO2(g) + NO2(g) → SO3(g) + NO(g)
SO2 = 3.5 mol/L
NO2 = 0.75 mol/L
SO3 = 3.0 mol/L
NO = 2.5 mol/L
Keq = [products] / [reactants] = [3.0][2.5] / [3.5][0.75] = 2.9

What would be the new equilibrium concentration of NO when Megan adds 1.5 mols of NO2 to a litre of the first mixture?

2.

3. The mixture would want to keep a of 2.9. When you add , the K decreases, and the mixture makes it up by shifting to the right so K becomes 2.9 (equalibrium) again.
Add 1.5 mole to the , And find out the concentration of NO and needed to get K to be 2.9 again. They would increase by the same amount.

4. Thanks a ton! That helped a lot

5. Glad to help.

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