2022-2023 英语周报 九年级 外研综合 44答案

2022-2023 英语周报 九年级 外研综合 44答案已经整理完毕，供同学们学习参考，更多英语周报答案，请关注本网站。

Sir years later, Radice found himself a patient atSt. Barnabas, infected with COVID-19. He couldn'tbelieve he was looking up into the eyes of the man whoseconfidence hed restored. At this time when doctorscouldn't help but be anxious, Pitera, once surrounded byworry, said he was able to deal with the stress far betterthan he would have before his heart attack. For Radicethose words "Not on my watch" were exactly what heneeded to hear. Slowly, day by day, his condition wasgetting better and better. Radice began his own exerciseprogram.Pitera visited as often as he could to cheer onRadices progress. Nearly 20 days after he wasadmitted, Radice was allowed to leave the hospital. Piteracame to his room to say goodbye."You saved my life,Radice told him. "You saved my life, " Pitera answeredback. Hospital employees lined the hallwaysapplauding, as Radice was wheeled to his wife waitingoutside."We have a lot of tough days ahead of usPitera said."Dan boosted a lot of people,s spirits justwhen we needed it

26〔解③(共15分,除标注外,其余每空2分)1)增加固液触面积,加快化学反应速率(1分)硫酸可将CaO转化为CaSO4渣而除去(2)玻瑀棒、烧杯、漏斗(3)水洛加热(1分)硫酸四氡合铜品体在乙醇中的溶解度小于在水中的溶解度(或降低了硫酸四合饲晶体的溶解度)(4)Cu+2H2so4(浓)=CuSO4+SO3·+2H2O上层清液由深篮色变为几乎无色(5)在不断搅拌下加入适量KOH溶液,再加入过量的IO%且:O2溶液,维持pH大于7,充分反应后,煮沸(除去过量的H2O2),静置、过滤,滤液用稀盐酸酸化至pH<5,燕发浓编、冰浴冷却鲒晶、过滤(3分)什么命题人考查化学实验综合知识。⑧么考●(1)“酸浸”时,需将电镀废渣硏细,其目的是增加固液接触面积,加快反应速率;用硫酸而不用盐酸,是由于硫酸可将Ca转化为CasO4渣而除。(2)过滮需要的玻璃仪器为玻璃棒、烧杯、漏斗。(3)加入乙醇可以降低硫酸四氨合铜晶体的溶解度,有利于品体析出。(4)反应完成时,溶液中Cu完全沉淀,上层清液由深蓝色变为几乎无色。(5)向浆状物中加入KOH溶液并充分搅拌,然后加入H2O2将铬氧化为CO,充分反应后再向容器中加入盐酸至pH<5,使CAO;转化为Cr20。最后蒸发浓缩、冷却结晶、过滤得到K2Cr2O2晶体,由于K2Cr2O1在冰水中溶解度较小,故要用冰水洗涤最后干燥即可。

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