According to an answer in this question, my concept used below does not apply:
In the non-cyclic photophosphorylation, consider splitting of two water molecules, then 4 e- (electrons) and 4 H+ (protons) are generated in the lumen of the thylakoid. Due to quinone cycle 8 H+ are transferred from stroma to lumen. 4 e- will reduce 2 NADP+ to 2 NADPH, these H+ are taken from stroma so there is a net decrease of 8 + 2 = 10 H+ and a net increase of 4 + 8 = 12 H+ in the lumen. So if we apply principles of chemistry then to attain equilibrium there should be equal number of H+ on both side. Therefore 11 H+ must be transferred from lumen of thylakoid to stroma. Now there is 1 H+ on each side at equilibrium. We know that F0-F1 ATPase will produce 1 ATP for 3 H+ being transferred so in this process 11/3 ATP should produce but in books it is given that all 12 H+ are transported which is violating the principle of chemical equilibrium and produces 12/3=4 ATP.
So I basically want to ask: Why does it seem that in this process the principles of chemistry are violated?