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一、甲基橙试剂的配制: 今年(80年)高考大纲中的指示剂里增加了“甲基橙”。这种试剂怎样配制?今介绍于后: 称取甲基橙粉末0.1克倒入干净的烧杯内,加蒸馏水100毫升搅拌使之溶解,将溶液倒入干净的滴瓶内备用即可。二、苯胺被重铬酸钾的酸性溶液氧化变色: 这个实验,课本没有介绍怎样操作,好一些书上也未找到,今根据自己摸索的一点经验介绍于后: 取3～4毫升清水,注入一支干净的试管,向试管的水里滴入饱和重铬酸钾溶液三
First, the preparation of methyl orange reagent: This year (80 years) in the college entrance examination outline in the indicator increased “methyl orange”. How to formulate this kind of reagent? Today is introduced in the following: Weigh 0.1g of methyl orange powder into a clean beaker, add 100 ml of distilled water to dissolve it, and pour the solution into a clean drop bottle. Second, aniline by potassium dichromate acidic solution oxidation color: This experiment, the textbook did not describe how to operate, some books have not been found, this is based on their own experience to introduce a little experience: Take 3 to 4 ml of water, inject A clean test tube, a solution of saturated potassium dichromate solution three drops of water into the test tube