Use: Demonstrate water electrolysis and the process of producing hydrogen and oxygen. Structure: Scale tube (scale value 1ml), alloy electrode, plastic base. Performance: Under the action of 12V-18V DC voltage, the ratio of oxygen to hydrogen generated in 3-5 minutes (10:20) verified that the water molecule is composed of one oxygen atom and two hydrogen atoms. Precautions: In the experiment, 10% sulfuric acid or sodium hydroxide (salt) can be added to the water to increase the conductivity. Caveat: Keep your eyes away as far as possible and bring protective glasses. It must be converted to direct current during the experiment. Note: Please feel free to E-MAIL us if there are any problems and questions, we will try our best to MEET YOUR SATISFACTIONS WITHIN 24 HOURS.