题目

鉴别以下几种物质
NaCl.K2SO4.NaCO3.KCl.NaHCO3 分步骤一一鉴别出来
`````````````````````````利用（①）反映
```````````````````````````````↓
``````````````现象（②） ``````````````现象（③）
`````````````1______溶液`````````````` 2______溶液
````````````````↓ ````````````````````````↓
```````````加(④)溶液 `````````````````加（⑤）溶液
````````↓ ``````````↓ ``````````↓ ``````````````````↓
````有沉淀 ````````无现象````` 有沉淀 ```````````````无现象
````原溶液 ````````原溶液````` 原溶液``````````````` 原溶液
````为(⑥)``````` `为KCl ``````为（⑦） ``````````````↓
````````````````````````````````````````````````````加（⑧）
```````````````````````````````````````````````↓ ```````````↓
````````````````````````````````````````````有气体```````` 无现象
````````````````````````````````````````````原溶液```````` 原溶液
````````````````````````````````````````````为（⑨）`````` 为NaCl
填出 1.2是什么溶液 和①至⑨的空
最好能告诉我反映方程和原理

提问时间：2021-03-30

答案

① 焰色反应
② 火焰呈浅紫色
③ 火焰呈黄色
④ BaCl2溶液
⑤ CaCl2溶液
⑥ K2SO4溶液
⑦ Na2CO3
⑧ 稀HCl
⑨ NaHCO3
1、KCl、K2SO4；2、NaCl、Na2CO3、NaHCO3.
加④溶液:BaCl2+K2SO4=BaSO4↓+2KCl
加⑤溶液:Na2CO3+CaCl2=CaCO3↓+2NaCl
加⑧:HCl+NaHCO3=NaCl+H2O+CO2↑