Question

The following reaction:

H2 (g) + I2 (g) ⇋ 2 HI (g)

Has an equilibrium constant of 30.5 under certain conditions. If initial concentrations of reactants and product are: [H2] = 0.100 M; [I2] = 0.100 M; and [HI] = 0.250 M, what will be the equilibrium concentration of HI?

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