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[求助]
幾句和化學(xué)有關(guān)英文呵呵
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英文底子實(shí)在是不怎么樣 像各位前輩求助了 先謝謝了 When the sodium hydroxide solution gets very hot, the chemist stops adding the reaction mixture to it until it cools down again.After all the black reaction mixture has been added to the sodium hydroxide solution, there is a brown liquid layer floating above the sodium hydroxide solution. This brown layer is free base. It also has a good deal of unreacted hydrochloride dissolved in it. This latter has to be neutralized because it will not distill in its present form. The 1000 ml flask is stoppered and shak vigorously for 5 minutes. This gets the hydrochloride into contact with the sodium hydroxide so it can react. [ Last edited by 飄落江南 on 2012-11-24 at 23:47 ] |


| 我的理解:當(dāng)氫氧化鈉溶液變得非常熱的時候,停止向其中加入反應(yīng)混合液,直到溶液冷卻下來。將所有的黑色混合液都加到氫氧化鈉溶液中之后,在溶液上方漂著一層棕色的液體層。這個棕色的液體層是游離堿。它也含有大量的未反應(yīng)的氫氯化物溶解在里面。它之后會成為中性溶液,因?yàn)樵诂F(xiàn)在的形態(tài)中不會被蒸餾出來。在密封好的1000ml的燒瓶劇烈攪拌5 min,使得氫氯化物與氫氧化鈉接觸而繼續(xù)反應(yīng)。 |

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