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一、仪器装置和实验步骤按右边图示连接好装置进行实验:选用12～16V的学生实验直流电源,将其负极与灯头插座上的一个接线螺丝用导线连接好,再往灯头插座插上一个“220V-15W”的普通灯泡;正极与石墨电极(也可用铁皮罐头盒直接作为电极)相连接,然后将灯泡和石墨电极悬空置于铁皮罐头盒中,往罐头盒中加入固体NaOH再加少量水使其润湿,用电炉加热至熔融.将灯泡上两个触点引线接入220V交流电源,灯泡通电发光,按下直流电键进行电解.当熔融液的温度升至220℃左右(大约需20分钟),在灯泡上方较冷处的内壁上便可看到银白色的金属钠析出.电解完毕后,关闭电源,把灯
First, the instrument device and the experimental procedure According to the right figure to connect the device to experiment: Select 12 ~ 16V student experiment DC power, the cathode and a lamp socket on a connection screw with wire, and then plug in a lamp socket “220V-15W” ordinary light bulb; positive electrode and graphite electrode (it can also be used as a tin can directly as an electrode), and then the light bulb and graphite electrode are suspended in a tin can box, add solid NaOH to the tin can add a small amount The water makes it wet and is heated in the electric furnace until it melts. Connect the two contact leads on the lamp bulb to the 220V AC power supply, and the bulb is energized. Press the DC button to perform electrolysis. When the temperature of the melt rises to about 220°C (approximately 20 minutes), silvery white metal sodium can be seen on the inner wall of the cold place above the bulb. After the electrolysis is completed, turn off the power and turn on the light.