What is being produced in electrolysis of water with baking soda (NaHCO3) dissolved in it, and carbon electrodes? Seems to be an extremely simple question, but every place i google up have a different answer. In practice, there is hydrogen on the cathode - it burns - but on the anode i get some unknown gas. It does not smell of anything - neither the itchy smell of CO2, nor fresh smell of oxygen, and i can't seem to get any reaction from a lit match. So, what is happening in there? Second question - what is happening in the water? One place i read that it would slowly turn into NaOH solution - would that actually happen?