Copper (II) tetraoxosulfatate (VI) Give us a break. How about copper (II) sulfate? CuSO4. Applying a voltage to the copper electrodes of this solution will produce hydrogen gas at the electrode connected to the negative pole of the battery, and oxygen gas at the electrode connected to the positive pole of the battery. The copper sulfate will function as the electrolyte and the hydrogen in water will be reduced (gain of electrons) and oxygen in water will be oxidized (loss of electrons). OILRIG = Oxidation Is Loss, Reduction Is Gain.
