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我们在讲电解液导电时,用下述方法演示离子的运动,现象非常明显。所用器材:一块约6×12cm~2的玻璃片;三层预先粘合在一起的滤纸一张(单层滤纸太薄,吸附电解液太小,电解液导电时发热蒸发,易干),滤纸尺寸略小于玻璃片;两块大小约为1 .sx乳m,的单面敷铜板(做电极用),其中一块上串联一个反压为35OV以上,正向电流大于30omA的晶体二极管(做半波整流),220v市电做电源;N与so’溶液、酚酞试剂、NaoH溶液、粗棉线一条,夹子两
When we say that the electrolyte is conductive, the movement of the ions is demonstrated by the following method. The phenomenon is very obvious. Equipment used: a piece of glass about 6×12cm~2; three layers of pre-bonded filter paper (the single-layer filter paper is too thin, the adsorption electrolyte is too small, the heat is evaporated when the electrolyte is conductive, easy to dry), the filter paper The size is slightly smaller than the glass piece; two pieces of single-sided copper clad plate (for electrode use) of size approximately 1.sx milk m, one of which is connected in series with a back-pressure of 35 OV or more and a forward current of more than 30 omA. Wave rectification) 220V mains power supply; N and so’s solution, phenolphthalein reagent, NaoH solution, coarse cotton thread, clip two