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水是生命的摇篮,是构成生物体组织细胞和体液的重要成分,是宝贵的自然财富。地球表面水的面积占70％,但由于环境污染,人类仍面临着淡水匮乏的危机。人们呼唤着蓝天 白云,绿水青山;向往着清澈的湖泊和 潺潺小溪。 水的结构 水分子不是直线型的,两个O-H 键的夹角约为104.5”。氧原子一侧带部 分负电荷,两个氢原子带部分正电荷, 分子内正、负电荷重心不重合,是典型 的极性分子(如下图)。
Water is the cradle of life, constitutes an important component of living tissue cells and body fluids, is a valuable natural wealth. Earth’s surface water accounts for 70% of the area, but due to environmental pollution, humans are still facing a crisis of lack of freshwater. People call blue sky and white clouds, green mountains and rivers; yearning for clear lakes and gurgling streams. Water structure of water molecules are not linear, the angle between the two OH bonds is about 104.5. "One side of the oxygen atom with a partial negative charge, two hydrogen atoms with a partial positive charge, the molecular positive and negative center of gravity does not coincide, Is a typical polar molecule (below).