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时间:2020-03-01
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1、实验活动1氧气的实验室制取与性质实验目的:1、学习实验室制取氧气的方法;2、加深对氧气性质的认识。实验用品:集气瓶、水槽、玻璃片、带导管的单孔橡胶塞、试管、铁架台、燃烧匙、镊子火柴、高锰酸钾、铁丝、木炭。实验步骤与方法:1.实验室制取氧气实验原理:1.()2.()3.()①查:检查,双手握住试管,观察玻璃管内水柱变化。②装:将药品在试管里,在试管口放()装好带导管的橡皮胶塞。③定:将试管固定在铁架台,铁夹应夹在试管的处,试管口应。④点:点燃酒精灯,用酒精灯的加热,先试管,使试管,然后将火焰集中在药品处加热。⑤收:采用收集气体,理由是。⑥离:将导管移开水槽。⑦熄:用酒精
2、灯灯帽熄灭酒精灯。注意:离,熄操作顺序不能颠倒,否则2.氧气的性质(1)木炭在氧气中燃烧现象:(空气中)(氧气中)结论:()(2)硫在氧气中燃烧现象:(空气中)(氧气中)结论:()(3)铁丝在氧气中燃烧现象:结论:()注意:盛有氧气的集气瓶中要留有,理由loanmanagement(post)review:1,approvalcriteriahavebeenimplemented;2,thecontractiscorrect;3,inlinewiththecontract,payment;4,noothermajorcasesagainstloansecurity;、
3、Reviewedby:dateofrecordform9:qilubankborrowingbysingleyearsofmaximumamountamaximumno-loanborrowers:borrowers:...Borrowernamenumber,lineofcreditexpirydateyearmonthdaytoyearmonthdaymaximumnumberofyearsintheloancontractarethetoplineopened,theborrowedandrequestedyourbankopenedcreditlinesabo
4、ve,isherebyrequested.Borrowersignature:dateagreedtoopencreditlines.CustomerManagersignature:dateagreedtoopencreditlines.Loanreviewsignature:datelinecancellation-Ididnotusetheloanamount,yourbankcreditlinestobecancelled.-Creditloanprincipalrepayment,yourbankcreditlinestobecancelled.Borrow
5、ersignature:date-unusedcreditlines,agreetowriteoffloans.-Creditloanprincipalrepayment,agreetowriteoffloans.CustomerManagersignature:datecase,agreetowriteoffloans.Loanreviewsignature:dateofrecordform16:qiluselfcreditforcreditcardcancellationapplicationformnameofborrowerIDnumberandcreditl
6、imitexpirationdateyearmonthdaytoyearmonthdayyearcontractnumberself-servicecard-Idonotusecredit,yourbankcreditlinestobecancelled.-Creditloanprincipalrepayment,yourbankcreditlinestobecancelled.Borrowersignature:date-unusedcreditlines,agreetowriteoffloans.-Creditloanprincipalrepayment,agre
7、etowriteoffloans.CustomerManagersignature:7实验活动2二氧化碳的实验室制取与性质【实验目的】1、练习实验室里制取二氧化碳和用向上排空气法收集气体2、加深对二氧化碳性质的认识【实验用品】烧杯、集气瓶、量筒、玻璃导管、胶皮管、单孔橡胶塞、双孔橡胶塞、铁架台(带铁夹)试管、试管夹、玻璃片、酒精灯、大理石、稀盐酸、澄清石灰水、紫色石蕊溶液、蜡烛木条、蒸馏水、火柴、胶头滴管【实验步骤】(一)制取二氧化碳1、连接装置2、检查装置气密性方法是3、装入药品:先加入,再加入,立即用带有导管的橡胶塞塞住试管口,看到的现象有:4、
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