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高一化学(甲种本)实验七中的第四项实验内容是从草木灰中提取钾盐并验证钾盐晶体中含有碳酸根离子、硫酸根离子和氯离子。为了检验上述三种阴离子,课本安排了如下操作: 取制得的少量晶体,放入试管,加入蒸馏水溶解并把溶液分成三分,分装在三个试管里: 在第一个试管里加入盐酸,观察发生的现象。[注]:这一步实验的目的是要验证溶
The fourth experiment in the Gaoyi Chemical (A) experiment was to extract the potassium salt from the plant ash and verify that the potassium salt crystal contains carbonate, sulfate, and chloride ions. In order to test the above three kinds of anions, the textbook arranges the following operations: Take a small amount of the obtained crystal, put it in a test tube, dissolve it by adding distilled water and divide the solution into three parts, and put it into three test tubes: Add hydrochloric acid to the first test tube Observe the phenomenon. [Note]: The purpose of this step experiment is to verify