# Does aqueous component contribute to the equilibrium constant?

Consider an equilibrium reaction with an aqueous solution $\ce{A(aq)}$ in equilibrium phase with gas: $$\ce{A(aq) + B(g) <=>[K_\mathrm{eq}] C(g)}$$ Would the equilibrium constant have aqueous solution $\ce{A(aq)}$ contributing to it?

In my opinion I think it would. Can anyone please correct me? Also, please help me find literature which explains equilibrium constant in details.

• When a substance is distributed between two phases chemists define a partition coefficient. – MaxW Sep 3 '17 at 16:17