实验步骤

现象

结论

该废液中一定没有盐酸                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      

该废液中一定含有Na₂CO₃

实验内容

实验现象

分析与结论

装有醋酸晶体试管内             ，装有醋酸溶液试管中镁带表面冒气泡。

酸的很多反应通常在水溶液中才能完成。

用玻璃棒蘸硫酸在白纸上写字

         （填“浓”或“稀”）硫酸使白纸炭化。

即使是同种酸，由于               不同，它们的性质不完全相同。

两试管中均产生               

不同的酸具有相似的性质，这是因为酸的溶液中都含有          （填化学符号）。

E试管中产生                 ，
F试管中无明显现象。

不同的酸根会导致酸的“个性”差异。因此，可用氯化钡溶液鉴别盐酸和硫酸。