| 查看: 608 | 回复: 3 | |||
nirenjie0627金虫 (小有名气)
|
[交流]
请虫友们帮忙翻译一段话，谢谢！
|
|
在已知浓度的定量KCl溶液中，加入定量过量的四苯硼钠标准溶液，再用双季铵盐滴定剩余的四苯硼钠，终点时稍过量的双季铵盐与溴酚蓝形成的盐溶于含氯有机溶剂成蓝色，同时做不加KCl的空白试验。 准确量取氯化钾溶液20ml于50ml容量瓶中，加四苯硼钠标准溶液25ml，加水稀释至刻度，摇匀。干滤纸过滤，弃去初滤液，量取滤液10ml于150ml锥形瓶中，加溴酚蓝指示剂0.5ml,三氯甲烷10ml,用双季铵盐溶液滴定至下层有机相显蓝色。 另取50ml容量瓶,加入四苯硼钠标准溶液25ml，乙酸—乙酸钠缓冲溶液20ml，用水稀释至刻度，取此液10ml于150ml锥形瓶中，同上操作进行空白试验。 |
回复此楼» 猜你喜欢
网上报道青年教师午睡中猝死、熬夜猝死的越来越多，主要哪些原因引起的？
已经有10人回复
-
为什么中国大学工科教授们水了那么多所谓的顶会顶刊，但还是做不出宇树机器人？
已经有13人回复
-
什么是人一生最重要的？
已经有8人回复
-
版面费该交吗
已经有17人回复
-
体制内长辈说体制内绝大部分一辈子在底层，如同你们一样大部分普通教师忙且收入低
已经有19人回复
-
【博士招生】太原理工大学2026化工博士
已经有8人回复
-
280求调剂
已经有4人回复
-
面上可以超过30页吧？
已经有12人回复
| A quantitative of known concentration of KCl solution, in which excess quantitative of sodium tetraphenylborate standard solution was added. The residual sodium tetraphenylborate was titrated by double quaternary ammonium salt. The formation of bromophenol blue and slightly quantitative of double quaternary ammonium salt at the titration end-point gave a chlorinated organic solvent soluble salt, which gives a visible color of blue in this solvent. Repeat the above procedure as a blank test without adding KCl. |
2楼2010-11-06 23:14:50
3楼2010-11-06 23:16:34
|
A quantitative of known concentration of KCl solution, in which excess quantitative of sodium tetraphenylborate standard solution was added. The residual sodium tetraphenylborate was then titrated by double quaternary ammonium salt. The formation of bromophenol blue and slightly quantitative of double quaternary ammonium salt at the titration end-point gave a chlorinated organic solvent soluble salt, which gave a visible color of blue in this solvent. Repeat the above procedure as a blank test without adding KCl. 稍作修改。 |
4楼2010-11-06 23:19:04