12-24-2025, 08:52 AM
I'm helping my high school chemistry students design a safe and clear electrolysis of water experiment to demonstrate the decomposition reaction and the 2:1 ratio of hydrogen to oxygen gas. We have basic lab equipment like a Hoffman apparatus, a DC power supply, and electrodes, but I'm concerned about achieving consistent, measurable results and ensuring safety with the produced gases. For other educators or hobbyists who have performed this demo, what electrolyte concentration and voltage did you find optimal for a visible, steady gas production without excessive heat or corrosion of the electrodes? How did you safely collect and test the gases to confirm their identity, and do you have any tips for making the quantitative aspect of the experiment more engaging and understandable for students?