The name for the substance produced at the positive electrode (anode) during electrolysis depends on the electrolyte being used. Here are some common examples:
1. If the electrolyte is water (H2O), the substance produced at the positive electrode is oxygen gas (O2).
2. If the electrolyte is a solution of sodium chloride (NaCl), the substance produced at the positive electrode is chlorine gas (Cl2).
3. If the electrolyte is sulfuric acid (H2SO4), the substance produced at the positive electrode is oxygen gas (O2).
The symbol for the positive electrode (anode) is typically represented as "A" or "+."