Cov txheej txheem:
Video: Koj ua li cas thiaj daws tau 1%?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Qhov loj ntawm ib tug solute uas yuav tsum tau nyob rau hauv thiaj li yuav ua a1 % daws yog 1 % ntawm qhov dej huv huv ntawm qhov xav tau ntim kawg. Piv txwv ntawm 100% kev daws teeb meem yog 1000 grams hauv 1000 milliliters lossis 1 gram ib 1 milliliter.
Ntxiv mus, koj yuav ua li cas 1% cov kua qabzib?
Txhawm rau ua haujlwm ntau npaum li cas qabzib koj xav tau ua a daws ntawm qhov muab feem pua, sib npaug (pawg/ntim) los ntawm ntim, ua raws li qhov xav tau 1 g hauv 100 ml yog 1 feem pua daws . Rau qhov piv txwv no, yog koj xav tau ua tag nrho daws 500 ml ntawm 20 feem pua qabzib , sib npaug (20/100) los ntawm 500.
Ib yam li ntawd, pes tsawg mg yog 1% tshuaj? Txhawm rau xam cov tshuaj ntau npaum li cas, nco ntsoov ib Basic nqe lus: Ib gram lossis ml ntawm cov tshuaj hauv 99 ml ntawm diluent yuav tawm los 1 % daws . Yog li ntawd, 1 ml ua a 1 % daws muaj. 01 gm (10 mg ) ntawm cov tshuaj.
Xav txog qhov no, koj yuav daws qhov feem pua li cas?
Cov ntsiab lus feem pua
- Feem pua ntawm pawg = pawg ntawm solutemass ntawm kev daws × 100%
- Feem pua ntawm pawg = 25g suab thaj 125g daws × 100%= 20%qab zib.
- qhov hnyav ntawm kev daws = feem pua ntawm qhov hnyav 100%× qhov hnyav ntawm kev daws = 5%100%× 3000g = 150gNaCl.
Kev daws 2% yog dab tsi?
2 % w / w daws txhais tau tias grams ntawm solute yog yaj nyob rau hauv 100 grams ntawm daws . Qhov hnyav / ntim % 4% w / v daws txhais tau tias 4 grams ntawm solute yog yaj nyob rau hauv 100 ml ntawm daws.
Pom zoo:
Koj yuav ua li cas thiaj tau cov hlau lo tawm ntawm koj cov hniav?
Cov hlau hlau ntawm cov hniav feem ntau tuaj yeem tshem tawm los ntawm kev txhuam nrog ci dej qab zib (sodium bicarbonate) lossis tshuaj peroxide (hydrogen peroxide 3%)
Puas tuaj yeem daws qhov kev daws teeb meem?
Nrog rau lwm cov zis tso zis, koj yuav tsum txhawj xeeb txog microwaving nws thiab ua kom nws nyob ze rau koj lub cev kom tsis txhob poob cua sov. Sub Kev daws teeb meem, txawm li cas los xij, muaj daim ntawv tso cai ua kom sov - lub vial me me ntawm lithium chloride (LiCl) uas tsis tuaj yeem kuaj pom los ntawm kev tshuaj yeeb tshuaj. Cov cua kub ntau dhau tuaj yeem tsim nyog pov tseg
Ntev npaum li cas kuv thiaj khaws tau kuv cov iav lo ntsiab muag hauv kev daws?
Khaws: Yog tias tsis hnav cov iav qhov muag tam sim ntawd, khaws cia rau hauv qhov kaw qhov rooj. Tsis txhob khaws koj cov lo ntsiab muag hauv cov ntsev ntsev yooj yim ntawm Biotrue ntau lub hom phiaj daws. Cov tshuaj ntsev yuav tsis tua kab mob. Cov tsom iav tuaj yeem khaws cia hauv rooj plaub uas tsis tau qhib kom txog thaum npaj hnav, txog li ntawm 30 hnub
Dab tsi yog qhov sib txawv tseem ceeb ntawm teeb meem tsom mus rau kev daws teeb meem thiab kev xav tsom mus rau kev daws?
Thaum kev ntxhov siab pom tau tias yog tswj tau, teeb meem tsom mus rau cov tswv yim daws teeb meem cuam tshuam nrog cov tsos mob ntawm kev puas siab puas ntsws, thaum nyob hauv qhov xwm txheej tsis txaus ntseeg, kev xav-tsom mus rau kev daws teeb meem cuam tshuam nrog cov tsos mob tsawg dua
Puas yog kev daws teeb meem kev kho mob tib yam li kev daws teeb meem luv luv kho?
Kev kho mob tsom mus rau kev kho mob, tseem hu ua kev daws teeb meem hais qhia luv (SFBT), yog hom kev kho mob uas muab qhov tseem ceeb tshaj ntawm kev tham txog kev daws teeb meem ntau dua (Berg, nd) Lo lus "luv luv" hauv kev kho mob luv luv yog qhov tseem ceeb