发布时间:2025-01-25 12:10:40
分别取少量加入斐林试剂甲醛和乙醛会产生砖红色沉淀,甲醇和乙醇不反应。甲醛和乙醛分别用碘仿反应检验,乙醛会产生黄色沉淀,甲醛无此现象;同样用碘仿反应鉴别甲醇和乙醇,乙醇会生成黄色沉淀,甲醇无此现象。
你好污水源热泵相关计算中如何确定污水中蕴含的热量和冷量比如100t47d的污水温差按3计
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