铁岭市六校协作体2021-2022学年度高三四联12月份月考英语答案

铁岭市六校协作体2021-2022学年度高三四联12月份月考英语答案，目前我们趣对答案已经整理了铁岭市六校协作体2021-2022学年度高三四联12月份月考英语答案的各科答案和试卷，更多试卷答案请关注本趣对答案。

第二节Then came the first class -- Chinese painting. The teacher showed us how to use a brush topaint bamboo on a piece of white paper. Then all the other students were in business. But it wasquite dificult for me. How could I hold the stiff brush and made it go as I wished? Hesitating for awhile, I tried dipping the brush into the ink bottle. When I took it out, drops of black ink fell onthe white paper. There was no bamboo, but big black dots!As I burnt with great embarrassment, Li Hua, who was next to me, gave me a warm smile. Ismiled back awkwardly She came over and demonstrated how to use the brush the brush movedacross the paper, and a lively bamboo appcarcd! With her help, I finally completed the task,although it was such a ugly one Aner that, we became good friends. She taught me Chinese whileI taught her English. We both made great progress in our studies. Yes, my mother was right. Asmile did make a difference

17.(1)Fe+2HH2↑+Fe2+(2分)Fe+2Fe33Fe2+(2分)过滤(1分)(2)C(1分)(3)氧化剂(1分)2H++2Fe2+H2O22Fe3++2H2O(2分)(4)红棕色(1分)112n(5)160×7100%(2分)【解析】某废料铁泥主要成分为Fe2O3、FeO和Fe,铁泥中加入足量硫酸,Fe2O3、FeO和Fe均会溶解,溶A中含有Fe+、Fe2+,气体为氢气,沉淀C为不溶性杂质;溶液A中加入H2O2溶液,将Fe2氧化生成Fe,再加入NaOH溶液得到Fe(OH)3沉淀,将Fe(OH)3沉淀洗涤、加热,分解得到Fe2O3,据此分析解答。(1)步骤(I)中铁单质既能与硫酸反应,也能与氧化铁溶解得到的Fe+反应,有关反应的离子方程式为Fe+2H+—H2↑+Fe2+、Fe+2Fe-3Fe2,分离溶液A和沉淀C的操作名称为过滤(2)检验溶液A中含有的Fe2可以选用酸性KMnO4溶液,若溶液颜色变浅或褪色,说明含有Fe2+(3)步骤(Ⅱ)中加入H2O2溶液,将Fe2氧化生成Fe2,H2O2溶液作为氧化剂,反应的离子方程式为2H++2Fe2++H2O2=2Fe+2H2O。(5)若最终获得ngFe2O3,其中含有的铁元素的质量56X2为则铁泥中铁元素的质量分数为16056×2g160112nX100%×100%g160v