Thank you.
Tom T.
2Na2SO4+4H2O -> 4(H+)+4(OH-) + 4(Na+) + 2(SO42-)
^^^^^^^^^^^^^^^^^these ions come from
the sodium sulfate...Na+ might only be helping the formation of OH-,
and the SO42- might only be helping the formation of H+...
4(OH-) -> O2+2H2O+4(e-)
4(H+)+4(e-) -> 2H2
dunno if correct or not...