电解水装置改进的尝试（An attempt to improve the electrolysis water plant）.doc

电解水装置改进的尝试（An attempt to improve the electrolysis water plant） The electrolytic water experiment is an important demonstration experiment on chemical grade nine in unit third. It reveals and confirms that water in nature is composed of two elements, hydrogen and oxygen, and their composition is 2:1. This is a complex experiment not only makes use of the principle of physical chemistry and electrochemistry, relates to the constant pressure in the DC electric field, many problems of redox condition and reaction rate control and how to reduce the side effects; the degree of corrosion of the operator also involves the reaction to alkaline or acidic medium well, the reaction products through the comprehensive utilization to reduce the experimental cost and reduce pollutant emissions. Defects in the original experimental device Before 2004, Baoding city middle school Jinfan experimental device of electrolysis of water, has been in accordance with the curriculum standards experimental instructions and recommendations made. There are many defects in the device. Because of the expensive platinum and gold electrode, the original device using the price is extremely cheap chrome clip, although it can complete the demonstration experiment, but its surface area is smaller, the reduction rate is low, 10mm (test tube hydrogen gas column height) / min, electrolytic 60mm high hydrogen gas column to 6 minutes. In addition, the chromium plated pin and wire joint part is easy to be damaged due to twisting during the installation and disassembly of the assembly, leading to the iron core exposed. We know that in the electrolysis, the hydroxyl in 2 negative charges of oxygen at the anode loses two electrons are oxidized to nascent oxygen atoms, which have very high oxidation in alkaline medium, very easy to iron oxide brown ferric hydroxide, and the water color, and cause confusion, affect the demonstration effect. At the same time, the high concentration lye is stained and lost, and the v