实验室常用下列装置研究气体的制取和性质,根据所学知识回答下列问题.(1)写出编号所指仪器的名称:a__

2025-03-28 09:33:07
推荐回答(1个)
回答1:

(1)标号仪器分别是试管、酒精灯;
(2)加热氯酸钾和二氧化锰的混合物生成氯化钾和氧气,文字表表达式为:氯酸钾

二氧化锰
加热
氯化钾+氧气;氯酸钾制取氧气需要加热,属于固体加热型,故选发生装置A;
(3)检验氧气是否收集满将带火星的木条放在集气瓶口,观察木条是否复燃进行判断;
(4)一氧化氮气体难溶于水,在空气中容易发生反应一氧化氮+氧气→二氧化氮,所以收集一氧化氮选择排水法不能选择排空气法收集;
(5)加热无水醋酸钠和碱石灰的固体混合物制取甲烷,所以制取甲烷选择固体加热装置;甲烷密度比空气小,可选择向下排空气法收集,甲烷难溶于水,可选择排水法收集;
故答案为:(1)试管;酒精灯;
(2)氯酸钾
二氧化锰
加热
氯化钾+氧气;A;
(3)将带火星的木条放在集气瓶口,带火星的木条复燃,证明已收集满;
(4)C;
(5)A:C或E.

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