13 years ago
extraction of oxygen and hydrogen from water by means of electrolysis.
To that end, we used magnesium sulfate (epsom salt) as electrolyte,
insulated copper wire with bare ends for electrodes, and a DC power
supply for electricity.
We collected hydrogen and oxygen into separate test tubes.
The part that did not work is that only one of the electrodes produced
any gas at all, and there was no gas coming out of the second
electrode. After a while of this, one test tube filled with gas and
the experiment stopped as the water was displaced from that
So, my question is how come there is no gas on the second electrode.
I do not understand why this is so, given that both the experiment
book as well as Wikipedia says that magnesium should not oxidize?
The water acquired bluish tint.