答案(1)∠(1分)圆底烧瓶(1分)2)gh→-f→a→b(或b→a)-d-c(2分)3)除去CO2中的水蒸气(1分)HCO32+H=CO2↑+H20(1分)4)赶尽装置中的空气,防止钠与氧气、水蒸气反应(1分)5)③(1分))②取①中滤液加入过量BaC2溶液,有白色沉淀生成,过滤(或其他合理答用干净的玻璃棒蘸取②中滤液于pH试纸上,pH试纸变蓝(或其他合理答题透析本题考查离子方程式、装置连接、试剂的作用、仪器的名称等知识力路点拔(1)实验室用大理石与稀盐酸反应制备CO2,采用固+液装置中仪器A的名称是圆底烧瓶。按气流由左至右的顺序,导管口连接顺序为CO2混合气体→g→h→e装置丙中浓硫酸的作用是除去CO2中的水蒸气。装置丁中饱和Nal装置内中浓式为HCO1+HC21+H104(4)点燃装置甲中酒精灯之润,需要通一段时间CO,气体,其目的是赶尽装置中的空气,防反应(5)装置乙中Cl溶液中没有黑色沉淀产生,说明反应③不可能发生(6实验少骤实验操作及现象取定量装置甲中反应后的固体溶1足量水中,有黑色不溶因体,过池取①中滤液加入过量BaC溶液,有白色沉淀生成,过滤用干净的玻璃棒施取②中速液1H试纸上,p试纸变蓝
书面表达One possible versionDear Mr. Smith.First of all, I would like to congratulate you on your school s sixtieth anniversary. The long history of theschool brings up its outstanding campus culture and educational concept. I take great pride in studying at thisexcellent school. At your invitation, I will perform a Chinese folk dance at the celebration ceremony to expressmy congratulations. Please prepare the audio equipment to play the accompanying music. I will prepare thedance music and costumes myself. I am delighted to be able to make a modest contribution to the promotion ofChinese culture and cultural exchanges between China and the UKBest wishes.Yours truly,Li Hua
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