What are the chemical substances formed by water photolysis? What is the destination of each of those substances?
Free electrons, hydrogen ions and molecular oxygen are liberated, after the water photolysis.
The electrons will change those electrons lost by chlorophyll molecules in photophosphorylation. The hydrogen ions will be incorporated into hydrogen acceptor molecules (NADP) and later will be used in the synthesis of glucose during the chemical stage. Molecular oxygen is liberated to the atmosphere.