honestly if this is for school or something your best answer is that it has a ph of 7. it might be slightly lower as h30 ions will be present however for all intent and purposes water has a ph of 7.
i say your best answer is 7 because the process of irradiation can vary. therefore w/out any other information ( the level of irradiation) one would have to assume it's effects are negligible.
This post was edited by zeratul87 on Dec 5 2010 08:28pm