18.(1)第二周期IA族(1分)(2)LiPF6 H2O=LiF POF3 2HF↑(2分)(3)H2(1分);AO OOh 2H2O=AOH)3￥ HCO(2分)(4)1:2(2分)(5)萃取、分液(2分)(6)蒸发浓缩(1分);趁热过滤(1分);0.2(2分)解析:本题考查钴酸锂回收利用流程分析。钴酸锂电池中含有LiCωO和单质铝,将废电池粉碎后用碱液浸泡,使A充分溶解,放出氢气,过滤后得到的滤液中含有偏铝酸钠滤渣为LOO2;通入过量的CO2调节滤液的pH,将偏铝酸钠转化成氢氧化铝沉淀;将滤渣用双氧水、硫酸处理,生成 LisSo、CoSO,反应的化学方程式为2 LiCoO H2O2 3H2SO4=LiSO4 2CoSO O2↑十4H2O;加入草酸生成草酸钴沉淀,其滤液通过加热浓缩后再加入饱和碳酸钠溶液,趁热过滤,最后得到碳酸锂固体。
书面表达One possible versionWinrWin CooperationOne of my best friends is an exchange student. At the beginning, he asked if I could assist him on how touse chopsticks. I couldnt agree more as I can practice speaking English as well. When teaching him, I managedto make myself understood. By the time he was able to use chopsticks skillfully, my spoken English hadimproved a lot, which was beyond my expectation.As the saying goes, " Helping others is helping ourselves. This experience not only brings me a valuablefriendship but also makes me realize the meaning of cooperation.
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