Reagents yog tshuaj, tsis muaj uas nws yog tsis yooj yim sua mus kawm chemistry

Tej muab faib Science News for KIDS yuav siv cov tej yam tshuaj. Muab lub fact tias cov reagents - ib yam khoom uas yuav ua rau muaj mob loj rau tib neeg noj qab haus huv, mus rau lawv cov cia yuav tsum tau raws li tej yam uas yuav tsum tau.

pab pawg neeg 7

Tshuaj reagents nyob rau hauv pab pawg neeg no muaj toxicity, yog li ntawd qhov kev tso kawm, muaj tej yam uas yuav tsum tau. lawv yog nyob rau hauv lub ruaj ntseg, uas yog nyob rau hauv laborantskoy. Nws muaj lub ntsiab ntawm lub pab, raws li zoo raws li ib tug kws qhia ntawv ntawm Science News for KIDS.

cia ntawm tshuaj txwv nyob rau hauv theem nrab tsev kawm ntawv, thiab nyob rau hauv lub chaw soj nstuam siab cov tsev kawm ntawv, lawv muaj yog tsuas pub yog tias ib tug tshwj xeeb kev txiav txim los ntawm lub taub hau ntawm lub koom haum. Kuaj ua nruj tswj ntawm kev siv nyiaj ntawm tej tshuaj, noj sau ntawv nyob rau hauv ib tug tshwj xeeb phau ntawv journal.

Daim ntawv teev cov inorganic tshuaj tso cai nyob rau hauv lub tsev kawm ntawv kuaj

Sau qhov yooj yim inorganic tshuaj, uas yog tso cai rau ua qauv qhia thwmsim nyob rau hauv Science News for KIDS qhia hauv tsev kawm ntawv:

• yooj yim tshuaj: sodium hlau, crystalline iodine, kua bromine;
• sodium hydroxide, hlau oxides thiab uas tsis yog-hlau;
• ntsev, xws li txoj tebchaw, dichromates thiab chromates;
• acid daws teeb meem.

organic tshuaj

Nco ntsoov reagents thiab organic tshuaj uas Science News for KIDS kws qhia ntawv yuav siv nyob rau hauv txoj kev ua schoolchildren tswv yim kev txawj ntse:

• aniline;
• organic acids;
• benzene;
• phenol;
• formalin.

mus rau lub muaj kev ruaj ntseg uas yuav tsum tau rau cov tshuaj

Muaj kev nyab xeeb mounted nyob rau hauv laborantskoy Science News for KIDS rau khaws cia reagents, pab pawg neeg 7, feem ntau yog ua los ntawm cov khoom ntawv hlau. Pub thiab txhim kho cov ntoo qauv, yog hais tias tus sab nraum muaj kev nyab xeeb yog hlua nrog hlau, thickness ntawm cov uas tsis yog tsawg tshaj li 1 hli.

Muaj cai thiab rau qhov chaw ntawm lub muaj kev nyab xeeb. Muab hais tias tus reactants yog high-uas yuav muaj qhov chaw, koj yuav tsum tau xaiv ib qho chaw nyob rau hauv lub ruaj ntseg, yog li ntawd nws yog ib qho yooj yim los mus ua kom nyob rau hauv cov ntaub ntawv ntawm qhov hluav taws kub.

Standard specifications los ntawm siab physiological kev ua si tshuaj

Ntawm cov reagents uas muaj xws li cov khoom, tej zaum nws yuav tau hais nws yog xim hlau zinc, calcium, lithium, oxide thiab hydroxide, calcium, nitrates hlau iodide, poov tshuaj permanganate, poov tshuaj, zinc tebchaw. Cov reagents yog tshuaj ntawm nce kev txaus ntshai, yog li ntawd, thwmsim nrog lawv yog tso cai nkaus xwb nyob rau hauv tib neeg saib xyuas ntawm tus xib fwb.

Tsis tas li ntawd muaj nyob rau hauv daim ntawv, thiab organic tshuaj xws li diethyl ether, acetone, alcohols, cyclohexane, chloroform, crude roj. Tej reagents yog tshuaj uas muaj ib tug ntxim rau cov tib neeg lub paj hlwb, yog li ntawd lawv cais tawm ntawm daim ntawv teev cov tshuaj preparations siv nyob rau hauv cov pa kawm cov tsev kawm ntawv rau cov tswv yim ua hauj lwm thiab kuaj thwmsim.

Cov chav kawm ntawv muaj peev xwm yuav accommodated (xauv) tsuas 8 pab pawg neeg ntawm cov tshuaj uas yog siv thaum lub sij hawm cov tswv yim ua hauj lwm thiab kuaj thwmsim. Tej reagents yog yam uas muaj kev ruaj ntseg rau cov kev kho mob ntawm cov me nyuam. Piv txwv li, ib tug tov ntawm chloride sodium sulfate poov tshuaj, poov hlau tshuaj dawb.

tuav cov kev cai rau cov me tsev kawm ntawv

Nyob rau hauv me me uas nyob deb nroog cov tsev kawm ntawv uas tsis koom nrog lub xub ntiag ntawm ib tug tshwj xeeb nyob rau hauv cheeb tsam laborantskuyu chav tsev, cia ntawm tshuaj yuav tsum tau them tshwj xeeb mloog. Piv txwv li, lub reagent acid nyob rau hauv uas lub concentration ntawm active neeg sawv cev tshaj 50 feem pua, yuav tsum tau muab tso rau hauv ib tug kaw lub hnab yas thiab khi.

Alkalis uas yog nyob rau hauv ib tug khoom hauv lub xeev, yuav tsum tau ntawm ib tug txiav txim deb ntawm lub acids, los ntawm khaws cia rau hauv lub Hoobkas ntim. Thaum qhib ib lub raj mis nrog sodium hydroxide los yog poov tshuaj yuav tsum tau nruj nreem kaw, ces muab tso rau hauv ib lub hnab yas los yog thawv, uas yog nruj nreem kaw nrog ib tug stopper.

Tsuas yog ib tug aqueous tov ntawm ammonia thiab hydrochloric acid muaj ib tug high vapor siab, ces nws yog ib qho tseem ceeb mus saib lub ceev ceev ntawm lub pob. Raws li ntxiv kev ruaj ntseg ntsuas thaum ua hauj lwm nrog cov reagents yog suav hais tias yog kev siv ntawm ntxiv sealing lub kaus mom, hnab yas rau lub tsev txhab nyiaj.

Yog hais tias muaj yog tsis muaj chaw rau ib tug nyias muaj nyias ib qhov kev tso kawm reagents 2,5,6 pawg tso cai rau lawv mus puag qhov chaw nyob rau hauv tib lub txee. Nyob rau hauv cov ntaub ntawv no, nws yog tsim nyog rau txhua pab pawg neeg mus coj ib tug nyias muaj nyias ib lub txee. Qhov zoo tshaj plaws kev xaiv yog muab rau cov sab sauv txee ntawm reagents, pab pawg neeg 5 hauv qab no yuav tau nkag nrog tshuaj lub tsev txhab nyiaj cov pab pawg neeg 6, hauv qab ntawm lub txee 2 pawg xa reagents.

xaus

Nyob rau hauv txhua tsev kawm ntawv, uas yuav tsum siv rau zaj lus kawm thiab yam kev ua ntawm cov tshuaj, muaj ib tug tshwj xeeb qhia ntawv, raws li uas ib tug tej yam chaw tseg rau lawv. Classic kuaj sectional khoom siv rau lub tsev tshuaj, hlua nrog niaj hnub polymeric ntaub ntawv uas yog resistant mus rau lub phiv los ntawm txhoj puab heev ib puag ncig.

Nyob rau hauv lub qhaj ntawv ntawm xws li ib tug tiv thaiv cladding, nws yog ib qho tseem ceeb los mus them tag nrho cov sab hauv qhov chaw ntawm lub txee roj xim nyob rau hauv 2-3 khaubncaws sab nraud povtseg ua bumpers rau lub rhawv, lub qhov siab ntawm cov uas yuav tsum muaj 3 cm.

Nyob rau hauv thiaj li yuav tiv thaiv lub rhawv los ntawm dej, lawv muab tso rau ob peb khaubncaws sab nraud povtseg ntawm polyethylene zaj duab xis. Tso rooj tog nyob rau hauv laborantskoy Science News for KIDS yog ua nrog nruj ua kevcai nco txog hluav taws kev ruaj ntseg cov kev cai.

Nyob rau ntawm cov phab ntsa los yog nyob rau ib lub qhov rooj laborantskoy Science News for KIDS chav kawm, yuav tsum muaj cov lus qhia rau cov neeg ua zog tiv thaiv, kev pom zoo thiab kos npe rau los ntawm tus thawj coj ntawm ib tug kawm ntawv, muaj cov tsiaj hiav txwv ntawm lub koom haum.