天气预报 > 其他 > 硅酸偏酸性还是偏碱性
硅酸偏酸性还是偏碱性
更新时间: 2020-08-15 00:00:00  

硅酸,化学式为H2SiO3,是一种弱酸,硅酸是偏酸性的。它的盐在水溶液中有水解作用。游离态的硅酸,包括原硅酸、偏硅酸、二硅酸 ,酸性很弱。正硅酸在pH为2到3的范围内是稳定的,不过若将过饱和的H4SiO4 溶液长期放置,会有无定形的二氧化硅沉淀,为乳白色沉淀,并以胶态粒子、沉淀物或凝胶出现。凝胶中有部分水分蒸发掉,可得到一种多孔的干燥固态凝胶,即常见的二氧化硅凝胶。

关键词: 硅酸 酸性 还是 碱性

硅酸偏酸性还是偏碱性相关经验

天气预报

最新推荐

页面:/news/view-2345716/ | 耗时:0.7695 s | 内存:2.11 MB | 查询:4 | 缓存读取:3 写入:0 | 加载文件:25
select * from tbl_Articles WHERE ArticleID=2345716 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2345716 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2345716 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(2416100,1106575,301650,2265184,1114558,2776418,2968639,3292881,1328202,2651576,2864939,1970908,2465173,254868,1124253,1989121,1517207,2360793,2330389,2168166,1086176,434151,1085354,614544,2862999,2387695,2267244,2852163,2790668,340957) ORDER BY field (ArticleID,2416100,1106575,301650,2265184,1114558,2776418,2968639,3292881,1328202,2651576,2864939,1970908,2465173,254868,1124253,1989121,1517207,2360793,2330389,2168166,1086176,434151,1085354,614544,2862999,2387695,2267244,2852163,2790668,340957)