天气预报15天查询> 其他> 碱面和酒精反应吗

碱面和酒精反应吗

更新时间: 2020-11-09 00:00:00     

1、乙醇中羟基的氢具有微弱的酸性,但只有同极强的碱才能显著的反应.

2、乙醇分子中含有极化的氧氢键,电离时生成烷氧基负离子和质子.CH3CH2OH→(可逆)CH3CH2O-+H+乙醇的pKa=15.9,与水相近.乙醇的酸性很弱

3、但是电离平衡的存在足以使它与重水之间的同位素交换迅速进行.CH3CH2OH+D2O→(可逆)CH3CH2OD+HOD因为乙醇可以电离出极少量的氢离子

4、所以其只能与少量金属(主要是碱金属)反应生成对应的醇金属以及氢气:2CH3CH2OH+2Na→2CH3CH2ONa+H2↑醇金属遇水则迅速水解生成醇和碱

关键词: 酒精 反应

如有意见、反馈、侵权或投诉等情况,请联系:

电话:
邮箱:

我们将会在48小时内给与处理!

版权所有 Copyright ? 2009-2020 tianqiyubao3.com

页面:/news/view-505192/ | 耗时:0.1650 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=505192 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=505192 LIMIT 0,1
select * from tbl_Articles_sphinx where id=505192 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1072435,1092606,1077772,1061862,1081408,1086348,1060573,1068180,1059901,1106892,1062240,1095812,1049448,1100769,1108992,1075895,1090348,1112312,1095159,1048510,1078767,1084617,1083215,1067183,1085428,1108640,1111722,1097029,1113417,1073477) ORDER BY field (ArticleID,1072435,1092606,1077772,1061862,1081408,1086348,1060573,1068180,1059901,1106892,1062240,1095812,1049448,1100769,1108992,1075895,1090348,1112312,1095159,1048510,1078767,1084617,1083215,1067183,1085428,1108640,1111722,1097029,1113417,1073477)