区别碳酸钠和碳酸氢钠的实验

2025-04-06 16:11:52
推荐回答(2个)
回答(1):

碳酸氢钠与盐酸反应快,加盐酸时的反应现象不同,故分别取少量相同质量的固体于试管中,加入过量相同浓度的盐酸,产生气体速度较快的是碳酸氢钠(或收集到气体体积较多的是碳酸氢钠); 碳酸钠与氯化钙反应,而碳酸氢钠与氯化钙不反应,反应现象不同,则分别取少量固体加水配成溶液,分别取少量于试管中,滴加少量氯化钙溶液,有白色沉淀生成的为碳酸钠; 碳酸氢钠受热易分解,而碳酸钠不能,则分别取mg两份固体,加热后称量,质量减少的为碳酸氢钠, 故答案为:  实验方案  实验现象与结论 分别取少量固体加水配成溶液,分别取少量于试管中,滴加少量氯化钙溶液 有白色沉淀生成的为碳酸钠 分别取少量相同质量的固体于试管中,加入过量相同浓度的盐酸 产生气体速度较快的是碳酸氢钠(或收集到气体体积较多的是碳酸氢钠) 分别取mg两份固体,加热后称量 称量后质量减少的为碳酸氢钠 .

回答(2):

11.1.1 碳酸钠和碳酸氢钠与盐酸反应,视频源于优翼100,课件制作精良。

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