實驗步驟

現(xiàn)象

結(jié)論

該廢液中一定沒有鹽酸                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      

該廢液中一定含有Na₂CO₃

實驗內(nèi)容

實驗現(xiàn)象

分析與結(jié)論

裝有醋酸晶體試管內(nèi)             ，裝有醋酸溶液試管中鎂帶表面冒氣泡。

酸的很多反應(yīng)通常在水溶液中才能完成。

用玻璃棒蘸硫酸在白紙上寫字

         （填“濃”或“稀”）硫酸使白紙?zhí)炕��?/p>

即使是同種酸，由于               不同，它們的性質(zhì)不完全相同。

兩試管中均產(chǎn)生               

不同的酸具有相似的性質(zhì)，這是因為酸的溶液中都含有          （填化學符號）。

E試管中產(chǎn)生                 ，
F試管中無明顯現(xiàn)象。

不同的酸根會導致酸的“個性”差異。因此，可用氯化鋇溶液鑒別鹽酸和硫酸。