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Ó¢Îĵ××ÓʵÔÚÊDz»ÔõôÑù Ïñ¸÷λǰ±²ÇóÖúÁË ÏÈллÁË 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 Æ®Âä½ÄÏ on 2012-11-24 at 23:47 ] |
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tutu9388
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phu_grassman: ½ð±Ò+2, thanks for your time. 2012-11-25 12:38:18
Æ®Âä½ÄÏ: ½ð±Ò+15, ·ÒëEPI+1, ¡ï¡ï¡ïºÜÓаïÖú 2012-11-25 14:38:32
phu_grassman: ½ð±Ò+2, thanks for your time. 2012-11-25 12:38:18
Æ®Âä½ÄÏ: ½ð±Ò+15, ·ÒëEPI+1, ¡ï¡ï¡ïºÜÓаïÖú 2012-11-25 14:38:32
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2Â¥2012-11-25 11:55:20
phu_grassman
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Æ®Âä½ÄÏ: ½ð±Ò+15, ¡ï¡ï¡ïºÜÓаïÖú 2012-11-25 14:38:48
Æ®Âä½ÄÏ: ½ð±Ò+15, ¡ï¡ï¡ïºÜÓаïÖú 2012-11-25 14:38:48
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3Â¥2012-11-25 12:29:22
tutu9388
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4Â¥2012-11-25 13:45:55
Æ®Âä½ÄÏ
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5Â¥2012-11-25 14:39:31














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