Flash ntawv, lossis nitrocellulose, yog cov ntaub so ntswg kho nrog nitric acid kom nws yuav hlawv tam sim tsis muaj pa taws lossis tshauv thaum kov mus rau nplaim taws. Flash ntawv yog siv los tsim cov yeeb yam tshwj xeeb ua yeeb yam thiab tseem ua haujlwm los ntawm cov khawv koob. Nws muaj peev xwm ua kom koj tus kheej daim ntawv nyem nyob hauv tsev tsis txhob yuav cov khoom lag luam kim. Raws li tsim cov ntawv nyem yuav tsum tau sib xyaw cov kua qaub muaj zog, koj yuav tsum tau ceev faj txog kev nyab xeeb thiab muaj kev paub ua haujlwm nrog tshuaj lom neeg hauv chaw kuaj ntshav. Yog tias koj xis nyob tsim koj tus kheej daim ntawv flash, koj yuav nyob nrog cov khoom siv qib zoo uas koj tuaj yeem siv los ua rau koj tsev neeg thiab cov phooj ywg xav tsis thoob!
Cov kauj ruam
Ntu 1 ntawm 3: Sib xyaw cov kua qaub
Kauj Ruam 1. Tiv thaiv koj cov tawv nqaij thiab qhov muag
Ua ntej koj pib ua haujlwm nrog cov kua qaub, nws yog ib qho tseem ceeb kom hnav cov iav tiv thaiv kom raug. Hnav lub tes tsho ntev uas npog koj txhais caj npab nrog rau looj tsom iav tiv thaiv kab mob, hnab looj tes, thiab apron. Koj kuj yuav tsum muaj kev nkag mus rau lub fume hood uas koj tuaj yeem ua haujlwm hauv qab.
Kauj Ruam 2. Teeb koj qhov chaw ua haujlwm
Nqa tag nrho koj cov khoom siv rau hauv qhov chaw nqus cua zoo thiab tso lawv nyob ib sab ntawm lub tshuab fume. Teem ib lub tais ntawm ci dej qab zib yog tias muaj kua qaub. Sodium bicarbonate neutralizes acids thiab ua rau nchuav tsis zoo thiab txaus ntshai.
- Nco ntsoov tias lub fume hood ua haujlwm ua ntej koj pib ua haujlwm.
- Yog tias cov kua qaub tau txau, nchuav cov dej qab zib ci rau qhov nchuav. Koj yuav pom npuas, uas txhais tau tias qhov nruab nrab nruab nrab yog ua raws li cov pa roj C02 raug tso tawm. Ntsuas qhov pH ntawm qhov txau nrog ntawv pH. Thaum nws nyob nruab nrab ntawm 6 thiab 9, nws muaj kev nyab xeeb los so qhov txeej nrog daim txhuam cev thiab ntxuav cov khoom hauv lub dab dej.
Kauj Ruam 3. Txiav daim ntawv ua plaub fab
Koj tuaj yeem tsim cov ntawv nyem tawm ntawm cov ntaub so ntswg, ntawv tso quav, lossis txawm tias yog paj rwb T-shirt. Tsuas yog xyuas kom tseeb tias txhua daim ntawv koj siv yog 100% paj rwb. Txiav tawm txawm li cas los xij ntau daim ntawv raws li koj xav tau rau hauv qhov loj ib yam li daim npav lag luam.
Kauj Ruam 4. Sib tov cov tshuaj nitric acid thiab concentrated sulfuric acid hauv lub khob dej
Hauv qab lub fume hood, nchuav cov kua nitric acid thiab ua kom muaj cov tshuaj sulfuric acid rau hauv 1 litre (0.26 US gal) (4.2 khob) lub tais hauv qhov sib piv 5: 4 (5 ntu concentrated nitric acid rau 4 ntu concentrated sulfuric acid). Nco ntsoov tias koj muaj cov kua txaus kom nws thiaj li nqus tau cov ntawv.
Sawv ntsug sab nraum lub fume hood, nrog lub beakers thiab kua qaub hauv lub hood. Muab koj txhais tes gloved tso rau hauv lub fume hood thiab ua txhua yam koj ua haujlwm yam tsawg kawg yog 6 ntiv tes (15.2 cm) los ntawm lub qhov rooj qhib
Kauj Ruam 5. Hloov cov kua qaub ua ke
Txhawm rau muab ob qho kua qaub ua ke, tuav lub taub dej thiab maj mam yaug nws nrog koj txhais tes me ntsis. Tsis txhob co cov kua qaub los yog swirl nws nrawm, vim qhov no tuaj yeem ua rau cov kua qaub txaws.
Ntu 2 ntawm 3: So thiab Npaj Daim Ntawv
Kauj Ruam 1. Ntxiv thiab muab cov ntawv tso rau hauv
Nqa ib daim ntawm koj daim ntawv thiab muab tso rau hauv lub taub dej kua qaub. Siv lub iav nplawm tus pas txhawm rau muab koj daim ntawv tso rau hauv dej kom txog thaum nws raug dej tag. Koj tuaj yeem ua tag nrho koj cov ntawv tib yam, yog li khaws ntxiv thiab tso cov ntawv nrog cov pas nrig iav kom txog thaum koj tau ntxiv tag nrho koj daim ntawv.
Kauj Ruam 2. Tos 15-20 feeb
Tom qab koj tau ntxiv koj daim ntawv kawg, tos 15-20 feeb rau daim ntawv kom nqus tau cov kua qaub. Txog qhov kawg ntawm kev tos, cov ntaub so ntswg lossis ntawv tsis tu ncua yuav tawm dawb, thaum ntawv tso quav yuav xim av me ntsis.
Kauj Ruam 3. Ncuav dej rau hauv 1 liter (0.26 US gal) (4.2 khob) beaker
Thaum koj tab tom tos daim ntawv kom tsau, sau qhov dav 1 litre (0.26 US gal) (4.2 khob) lub raj mis lossis lub raj mis ib nrab nrog dej. Nco ntsoov tias lub beaker yog dav txaus kom haum cov ntawv. Muab lub khob dej tso rau ib sab ntawm lub tais uas muaj kua qaub.
Kauj Ruam 4. Hloov daim ntawv mus rau hauv chav da dej
Siv ob rab qau los yog tus nplaig nqa ib daim ntawv tawm ntawm cov kua qaub. Khaws daim ntawv tso rau saum lub lauj kaub ntawm cov kua qaub kom txog thaum nws tsis txhob poob. Thaum daim ntawv tsis tso dej, ua tib zoo xa daim ntawv mus rau hauv lub khob dej. Rov ua cov txheej txheem no rau txhua daim ntawm koj daim ntawv, ua kom ntseeg tau tias lawv tsum tsis txhob poob qis ua ntej koj xa lawv mus.
Tam sim no koj tau ua tiav nrog cov kua qaub. Neutralize cov kua qaub los ntawm kev nchuav ci dej qab zib rau hauv lub beaker ntawm cov kua qaub, tos kom txog thaum npuas npuas nres. Tom qab ntawd tig rau dej thiab ncuav cov kua nruab nrab nruab nrab tso rau hauv lub qhov dej. Khiav dej rau ob peb feeb ntxiv, tom qab ntawd tua nws
Kauj Ruam 5. Tsau daim ntawv li 5 feeb
Tawm cov ntawv hauv cov dej da dej li tsib feeb, siv lub khob iav los txhuam cov ntawv. Yog tias koj siv daim ntawv tso quav, koj yuav tsum pom daim ntawv tig los ntawm xim av mus rau dawb.
Kauj Ruam 6. Ncuav cov dej thiab sau lub khob dej
Nqa lub khob dej mus rau lub dab dej. Nws tsis tas yuav tsum ua haujlwm nyob rau hauv lub fume hood ntxiv lawm, raws li koj tau ua tiav kev ua haujlwm nrog cov kua qaub. Ua tib zoo nchuav cov dej tawm ntawm lub beaker, siv lub khob iav los thawb cov ntawv rov qab kom nws tsis txhob khiav tawm ntawm lub beaker. Tom qab koj tso cov dej tawm, tig rau lub dab dej thiab nchuav cov dej sov kom zoo ib yam rov qab rau hauv lub khob.
Qhov koj tseem ceeb ua yog ntxuav daim ntawv kom tshem tawm cov kua qaub ntau
Kauj Ruam 7. Rov ua cov txheej txheem ntxuav ob peb zaug
Rov ua cov txheej txheem ntawm cov dej ntws tawm, tom qab ntawd muab lub raj mis rov qab ua ob lossis peb zaug ntxiv. Qhov no yuav yaug cov ntawv kom zoo.
Kauj Ruam 8. Muab daim ntawv tso rau ntawm daim phuam ntawv
Nqa cov ntawv tawm ntawm tus da dej ib los ntawm ib tus nrog tus nplaig, ncua rau ntawm lub beaker kom txog thaum lawv ua tiav. Tom qab ntawd muab cov ntawv tso rau ntawm ib sab ntawm daim ntawv phuam. Muab daim ntawv tso rau ntawm daim ntawv phuam kom qhuav ib hmos, lossis ntev li 8 teev.
Nco ntsoov tias lawv tsis sib tshooj kom lawv qhuav sai dua
Kauj Ruam 9. Muab daim ntawv tso rau hauv sodium bicarbonate
Tom qab ntawv tau qhuav lawm, sau 1 litre (0.26 US gal) (4.2 khob) beaker nrog 1 ML daws ntawm sodium bicarbonate. Tom qab ntawd muab txhua daim ntawv raws li koj tau ua nrog da dej hauv sodium bicarbonate.
- Yog tias koj pom cov npuas dej, nqa lub khob dej mus rau lub dab dej thiab nchuav cov sodium bicarbonate, tuav cov ntawv rov qab nrog lub khob iav. Tom qab ntawd ntxiv dej ib yam li koj tau ua ntej, ntxiv nws thiab tso ob peb zaug.
- Tos kom daim ntawv qhuav kom huv, hmo ntuj lossis ntev txog 8 teev.
Kauj Ruam 10. Muab daim ntawv tso rau hauv ethanol
Sau lub lauj kaub nrog cov ethanol txaus los tso cov ntawv, tom qab ntawv ntxiv cov ntawv zoo li koj tau ua rau sodium bicarbonate. Cia lawv tsau rau hauv cov tshuaj ethanol li 15-20 feeb, tom qab ntawd coj lawv tawm, tos kom lawv tsum tsis txhob poob, thiab muab lawv tso rau ntawm daim ntawv phuam tshiab.
Ntu 3 ntawm 3: Teeb Daim Ntawv
Kauj Ruam 1. Nqa daim ntawv mus rau qhov chaw nruab nrab
Thaum koj taws cov ntawv ntawm hluav taws, koj xav kom nyob hauv ib puag ncig nyab xeeb uas tsis muaj cov khoom tawg tau nyob ib puag ncig. Qhov no tuaj yeem yog chav kuaj lossis ib puag ncig zoo ib yam li ntawm txoj kev ntawm koj txoj kev tsav tsheb. Nqa cov ntawv uas koj qhuav, ntais ntawv, thiab cov nplaim hluav taws pov thawj zoo li lub tais ci lossis khob ntsuas, nrog rau lub tshuab tua hluav taws.
Kauj Ruam 2. Tuav ib daim ntawv nyem nrog rab riam los tuav
Thawj zaug ua kom ntseeg tau tias daim ntawv nyem tau qhuav tag vim tias qhov ua kom yuam kev yuav tsis ua haujlwm yog tias nws tseem ntub ib nrab. Thaum koj tau txheeb xyuas tias nws qhuav, siv ob txhais tes ntawm cov nplaim taws uas tsis muaj cua sov los yog lub zog tuav los ua ib daim ntawv nyem rau ntawm lub thawv pov thawj nplaim taws.
Kauj Ruam 3. Teeb daim ntawv nyem rau hluav taws
Teeb lub ntais ntawv, tom qab ntawd tuav nws mus rau daim ntawv nyem. Koj yuav pom tias daim ntawv tam sim hluav taws, tom qab ntawd pib hlawv sai sai yam tsis muaj cov hmoov tshauv lossis cov seem!
Tom qab koj ua tiav nrog koj daim ntawv nyem, muab ib daim ntawv ntxiv rau hauv qhov chaw nyab xeeb zoo li lub tub rau khoom lossis lub hnab ntawv, vim tias lawv kub hnyiab heev
Yees duab - Los ntawm kev siv qhov kev pabcuam no, qee cov ntaub ntawv yuav raug muab qhia rau YouTube
Lub tswv yim
- Tsim ntau daim ntawv ntawm cov ntawv nyem ntawm ib lub sijhawm kom koj muaj cov khoom lag luam thaub qab!
- Txawm hais tias koj tau ntsib nyob hauv chav kuaj mob, nws ib txwm zoo kom muaj ib tus neeg nyob ntawd kom saib xyuas koj.
Lus ceeb toom
- Cov kua qaub tuaj yeem ua rau mob hnyav ntxiv rau ua rau koj cov tawv nqaij thiab qhov muag puas. Ib txwm hnav lub iav tiv thaiv kom raug thiab xyuas kom tseeb tias koj tab tom ua haujlwm nyob rau hauv lub fume hood thaum ua haujlwm nrog kua qaub.
- Yog tias muaj hluav taws, rub tus pin nyob rau sab saum toj ntawm lub tua hluav taws, tsom lub taub hau ntawm lub hauv paus ntawm qhov hluav taws kub, nyem tus pas thiab cheb lub tshuab tua hluav taws ntawm ib sab mus rau sab kom txog thaum hluav taws tau tas. Hu rau 911 yog tias qhov hluav taws kub tswj tsis tau.
- Tsis txhob sim ua daim ntawv nyem yog tias koj tsis muaj kev nkag mus rau lub chaw kuaj ntshav thiab tsis yog kws paub txog tshuaj lom neeg.
