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如何检验卤代烃的卤原子

更新时间: 2020-09-16 00:00:00     

1、取少量样品,加入氢氧化钠H水溶液加热使卤原子变成卤离子;

2、再加入稀硝酸致溶液变为酸性(一定要酸化使溶液呈酸性,不然氢氧根会对结果有影响);

3、加入硝酸银溶液生成沉淀;

4、看沉淀颜色,氯化银沉淀是白色的,溴化银沉淀是淡黄色的,碘化银沉淀是黄色的。

关键词: 如何 检验 原子

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