高三英语周报第14答案

书面表达One possible versionDear PeterI'm writing to invite you to see the Chinese Painting Exhibition to be held in our city.The exhibition will start at 8: 30 am on Saturday and last till 5: 00 pm on Sunday in the city museum It'ssaid that a large number of Chinese paintings, some of which are original works by famous painters like ZhangDaqian and Qi Baishi, will be on display. Besides, there will be various souvenirs to be sold. I know you re veryinterested in traditional Chinese culture, so I can t wait to tell you the news and hope we can go together.Looking forward to your reply.You

23.(13分)(1)①除去氯气中混有的HC1气体(2分)22Na2 CO3+2Cl2+H20--2NaHCO3, +2NaCl+Cl2O(2分)③B(2分)(2)①向上排空气法(1分)防止Cl2和CO2泄漏(2分)②C|O2+2CN一N2+2CO2+2Cl(2分八5013(2分)解析】(1)①氯气中混有氯化氢和水蒸气,故装置B用于除氯化氢。②由题意知,X为C2Q,反应方程式为2Na2CO3+2Cl2 t= NaHCO3+2NaC1+Cl2O③Cl2O与H2O发生化合反应生成HCO,HCO具有酸性和强氧化性(漂白性),所以能使湿润的蓝色石蕊试纸先变红后褪色,A项正确;HClO在空气中易分解生成HC和O2,B项错误;由于Cl2和C2O都有毒性需用NaOH溶液进行尾气处理,C项正确;Cl2与H2O反应生成HC和HCO,D项正确(2)①根据题目信息可知,CO2能与H2O反应,且密度比空气大,故实验室可采用向上排空气法收集。由于Cl2和CO2都是有毒气体,制备时需特别注意防止Cl2和ClO2的泄漏。②CO2将CNˉ氧化为N2和CO2,同时生成C,反应的离子方程式为2CO2+2CN-=N2+2CO2+2C!。100m3这种污水含有CN的质量为50b10g,其物质的为13mol,故消耗ClO2的物质的量为n3mol

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