本文用CNDO/2的量化计算方法估计了单硅酸、双硅酸和三硅酸分子中氢氧键的强度,并以此解释实验发现的这几种硅酸溶液的酸强度:单硅酸>双硅酸<三硅酸。 In this paper, the strength of hydrogen and oxygen bonds in monosilicic acid, di-silicic acid and trisilicate molecules was estimated by the quantitative calculation method of CNDO / 2, and the acid strength of these silicic acid solutions was explained by the experiment. Monosilicic acid > Bis-silicic acid