[Boxxxed]

The KH value (in mol L-1 atm-1) is 1.23 (note it’s not the log). Assuming a gaseous effluent whose partial pressure is 2 × 10-3 atm, calculate the value of the un-dissociated species [H2SO3*], in mol/L. Write the reaction, the equilibrium constant and show your calculation.

I dont understand this wording. What is a Kh value. I've never seen that before. What is the gaseous effluent? What role does it play? I have no idea what this question is even trying to ask other than find concentration of undisassociated H2SO3.

I assume Kh value must be equilibrium constant like anything else.

H2SO3+ H2O-->HSO3+H3O.

Is the 2x10-3 atm the partial pressure of H2SO3?