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一、水分子的极性在一个直径为12cm的培养皿中,放入约1/2容积的CCl_4,然后向CCI_4液面上滴加2——3滴水,则水滴浮于液面上呈球形。用丝绸磨擦玻璃捧(带正电),使玻璃棒靠近水球时,水珠被吸引,在液面上移动。再用猫皮摩擦橡胶棒(带负电)后,重复上述作法,亦有同样效果。由此可证明水分子具有极性。如果
First, the polarity of water molecules in a 12cm diameter petri dish, put about 1/2 volume of CCl_4, and then drop 2 to 3 drops of water on the CCI_4 liquid surface, then the water droplets float on the surface spherical . When the glass rod is close to the water ball, the water droplet is attracted and moves on the liquid surface by rubbing the glass with silk (positive charge). Repeating the above method after rubbing rubber rods (negatively charged) with cat skin has the same effect. This proves that water molecules have polarity. in case