题干

化学课堂上老师演示了如图所示的几个实验:

(1)上述实验中出现的现象,与CO2的物理性质和化学性质都有关的是:____ (填序号);

(2)图A所示实验中,紫色干花(用石蕊溶液浸泡过)最终会变红,原因是:____ (用化学方程式解释);

(3)图C所示实验中,经振荡后可观察到的实验现象有____ (填序号).

①软塑料瓶变瘪                 ②瓶内生成了白色的碳酸钙    ③瓶内澄清石灰水变浑浊         ④瓶内溶液变红.

上一题 下一题 0.0难度 选择题 更新时间:2011-11-23 10:39:29

答案(点此获取答案解析)

B,H2O+CO2=H2CO3,①③

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