Hydrogen production device by chemical electrolysis of water in junior high school

Hydrogen production devices by water electrolysis include Hoffman electrolyzer, DC power supply (or lead storage battery), wires, test tubes, alcohol lamps, gas measuring tubes, induction coils, electric keys, iron racks, iron clips, gas cylinders, glass sinks, etc.

Hydrogen production by water electrolysis is a simple method. Direct current is introduced into the electrolytic cell filled with potassium hydroxide or sodium hydroxide, and water molecules undergo electrochemical reaction on the electrode and decompose into hydrogen and oxygen.

Electrolyzing water is a chemical experiment. Through the decomposition and synthesis experiments of water, we know that water is composed of two elements: hydrogen and oxygen. The principle is that water can be decomposed into hydrogen and oxygen under the action of direct current. When electric sparks pass through the mixed gas of hydrogen and oxygen, they will be converted into water. Both experiments show that water is composed of hydrogen and oxygen, and their volume ratio is 2∶ 1.