【判断题】![](https://cos-cdn.shuashuati.com/shuashuati-wap/asset/rightlogo.png)
细口瓶盛放酸性试剂要用橡胶塞。碱性试剂要用玻璃塞。
举报
参考答案:
![](https://cos-cdn.shuashuati.com/shuashuati-wap/asset/rightlogo.png)
参考解析:
![](https://cos-cdn.shuashuati.com/shuashuati-wap/asset/rightlogo.png)
举一反三
![](https://cos-cdn.shuashuati.com/shuashuati-wap/asset/rightlogo.png)
【单选题】利用pH梯度萃取法分离蒽醌衍生物时,选取碱性试剂的顺序是
A.
5%Na
![](https://cdn.shuashuati.com/imgs/b2fc4b9413cc636422b01a97c0648e4d.gif)
CO
![](https://cdn.shuashuati.com/imgs/388c2efd5771c260afb438d12f71c530.gif)
、1%NaOH、5%NaOH、5%NaHCO
![](https://cdn.shuashuati.com/imgs/388c2efd5771c260afb438d12f71c530.gif)
B.
5%NaOH、1%NaOH、5%Na
![](https://cdn.shuashuati.com/imgs/b2fc4b9413cc636422b01a97c0648e4d.gif)
CO
![](https://cdn.shuashuati.com/imgs/388c2efd5771c260afb438d12f71c530.gif)
、5%NaHCO
![](https://cdn.shuashuati.com/imgs/388c2efd5771c260afb438d12f71c530.gif)
C.
5%NaHCO
![](https://cdn.shuashuati.com/imgs/388c2efd5771c260afb438d12f71c530.gif)
、5%Na
![](https://cdn.shuashuati.com/imgs/b2fc4b9413cc636422b01a97c0648e4d.gif)
CO
![](https://cdn.shuashuati.com/imgs/388c2efd5771c260afb438d12f71c530.gif)
、1%NaOH、5%NaOH
D.
5%Na
![](https://cdn.shuashuati.com/imgs/b2fc4b9413cc636422b01a97c0648e4d.gif)
CO
![](https://cdn.shuashuati.com/imgs/388c2efd5771c260afb438d12f71c530.gif)
、1%NaOH、5%NaHCO
![](https://cdn.shuashuati.com/imgs/388c2efd5771c260afb438d12f71c530.gif)
、5%NaOH
E.
5%NaHCO
![](https://cdn.shuashuati.com/imgs/388c2efd5771c260afb438d12f71c530.gif)
、5%Na
![](https://cdn.shuashuati.com/imgs/b2fc4b9413cc636422b01a97c0648e4d.gif)
CO
![](https://cdn.shuashuati.com/imgs/388c2efd5771c260afb438d12f71c530.gif)
、5%NaOH、1%NaOH