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一、Fe(OH)3胶体电泳实验现行高中化学课本中的Fe(OH)3胶体电泳实验是采用把电极直接插入溶胶内,使溶胶被破坏而凝聚析出胶粒,聚集成的颗粒使电极附近的溶胶变成红褐色浑浊,即形成电泳,但现象不明显。特做如下改进。在洗净的U形管内,注入渗析过的Fe(OH)3溶胶(约U形管容积的23),
I. Fe(OH)3 Colloidal Electrophoresis Experiment The current Fe(OH)3 colloidal electrophoresis experiment in high school chemistry textbooks uses electrodes that are inserted directly into the sol, so that the sol is destroyed and the colloidal particles are aggregated, and the aggregated particles are brought together near the electrodes. The sol became reddish-brown and turbid, ie electrophoresis was formed, but the phenomenon was not obvious. Special improvements are as follows. In a cleaned U-shaped tube, infiltrate the dialyzed Fe(OH)3 sol (about 23 U-tube volume).