1. 烷烴
1. Alkanes
如己烷、戊烷等。首先用濃硫酸洗滌幾次以除去烯烴,水洗,CaCl2干燥,必要時用鈉絲或P2O5干燥,蒸餾。存放于帶塞的試劑瓶中。
Such as hexane, pentane, etc. First, wash several times with concentrated sulfuric acid t...
1.在涂料行業(yè)也有廣泛的應用。除了用作涂料的填料外,它還取代了二氧化鈦和顏料、輕質鈣和沉淀硫酸鋇。
1. It is also widely used in the coating industry. In addition to being used as filler for coatings, it also replaces ti...
1、計算氫氧化鉀和水的比例:這里以30%氫氧化鉀溶液為例,那么則需要氫氧化鉀30g,水80g。
1. Calculate the ratio of potassium hydroxide to water: take 30% potassium hydroxide solution as an example, then 30g pota...
簡單來說,能區(qū)分兩個物質酸堿性強弱的叫做區(qū)分溶劑,否則就叫做拉平溶劑。題目中說的氫氧化鈉和氫氧化鉀同時溶解在水中,都會完全電離,這就是說二者被水這個溶劑拉平了,而表現(xiàn)出了相同的堿性。如果采用乙醇或液氨等作為溶劑,即可區(qū)分出二者堿性的強弱。
In short, the solvent that can distinguish the aci...
化學式NaOH,通常被稱為燒堿、火堿、苛性鈉,是一種強堿,通常是片狀或塊狀形狀,具有強腐蝕性。易溶于水(溶于水時放熱)并構成堿性溶液,另具潮解性,易于從空氣中吸收水蒸氣(潮解)和二氧化碳(蛻變),可以參與鹽酸檢驗是否變質。
Chemical formula NaOH, commonly known as caustic soda, cau...