Why doesn't water undergo electrolysis?

Why does Na2SO4 undergo electrolysis?

1 answer

This may be a question of semantics.
Water does electrolyze.
Na2SO4 does not.

BUT, water has such a low ionization that it doesn't conduct electricity very well (due to the lack of ions). Adding a little Na2SO4 provides the ions to conduct the electric current; under those conditions H2O is electrolyzed to H2 and O2.
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