1. 烷烃
1. Alkanes
如己烷、戊烷等。首先用浓硫酸洗涤几次以除去烯烃,水洗,CaCl2干燥,必要时用钠丝或P2O5干燥,蒸馏。存放于带塞的试剂瓶中。
Such as hexane, pentane, etc. First, wash several times with concentrated sulfuric acid t...
1.在涂料行业也有广泛的应用。除了用作涂料的填料外,它还取代了二氧化钛和颜料、轻质钙和沉淀硫酸钡。
1. It is also widely used in the coating industry. In addition to being used as filler for coatings, it also replaces ti...
1、计算氢氧化钾和水的比例:这里以30%氢氧化钾溶液为例,那么则需要氢氧化钾30g,水80g。
1. Calculate the ratio of potassium hydroxide to water: take 30% potassium hydroxide solution as an example, then 30g pota...
简单来说,能区分两个物质酸碱性强弱的叫做区分溶剂,否则就叫做拉平溶剂。题目中说的氢氧化钠和氢氧化钾同时溶解在水中,都会完全电离,这就是说二者被水这个溶剂拉平了,而表现出了相同的碱性。如果采用乙醇或液氨等作为溶剂,即可区分出二者碱性的强弱。
In short, the solvent that can distinguish the aci...
化学式NaOH,通常被称为烧碱、火碱、苛性钠,是一种强碱,通常是片状或块状形状,具有强腐蚀性。易溶于水(溶于水时放热)并构成碱性溶液,另具潮解性,易于从空气中吸收水蒸气(潮解)和二氧化碳(蜕变),可以参与盐酸检验是否变质。
Chemical formula NaOH, commonly known as caustic soda, cau...
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