Cov txheej txheem:
Video: Koj pom molarity li cas los ntawm qhov ntom thiab feem pua?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Molarity yog tus naj npawb ntawm moles ntawm soluteper liter ntawm kev daws. Hloov ua ceev los ntawm kev muab tus lej ntawd ntau ntxiv moles los ntawm molecular mass ntawm lub compound. Convert ceev rau molarity los ntawm kev hloov mus rau gramsper liter thiab faib los ntawm molecular mass ntawm cov compound ingrams.
Raws li txoj cai, koj yuav nrhiav tau qhov concentration ntawm qhov ntom ntom li cas?
Faib qhov loj ntawm solute nyob rau hauv qhov kev daws nws qauv pawg. Piv txwv li, cov tshuaj muaj 100 gof potassium chloride - 100 ÷ 74.55 = 1.32 moles. Faib tus naj npawb ntawm moles los ntawm qhov ntim ntawm kev daws hauv litres (L). Piv txwv li, kev daws yog 1.5 L - 1.32 ÷ 1.5 = 0.88.
Tsis tas li ntawd, tus qauv yog dab tsi los xam qhov ceev? Kev sib npaug ntom ntom rau cov no Kev suav : Cov Tshuab xam zauv ceev siv cov qauv p = m/V, or ceev (p) yog sib npaug rau qhov loj (m) faib los ntawm ntim (V). Cov tshuab xam zauv tuaj yeem siv ob qho ntawm qhov tseem ceeb rau xam peb. Qhov ntom txhais tau tias yog loj perunit ntim.
Nyob rau hauv no hais txog, yuav ua li cas koj nrhiav tau ib feem pua ntawm cov density?
Ib feem pua
- Nrhiav cov molar loj ntawm tag nrho cov ntsiab nyob rau hauv lub compound ingrams ib mole.
- Nrhiav cov molecular loj ntawm tag nrho cov compound.
- Faib cov khoom molar mass los ntawm tag nrho cov molecularmass.
- Tam sim no koj yuav muaj tus lej ntawm 0 thiab 1. Muab nws los ntawm 100% kom tau txais cov feem pua.
Koj hloov cov feem pua rau moles li cas?
- Moles thiab Molar daws (unit = M = moles / L)
- Kev daws teeb meem feem pua (% = seem ib puas lossis grams / 100 ml)
- Txhawm rau hloov los ntawm % tov rau molarity, muab cov % tov los ntawm 10 los qhia qhov feem pua cov tshuaj grams / L, ces faib los ntawm cov qauv hnyav.
Pom zoo:
Dab tsi yog qhov ntom ntom ntom ntom ntom ntom ntom?
Ib daim phiaj density yog ib qho piv txwv ntawm kev faib cov lej sib txawv. Nws yuav siv ib ntsiav ceev kwv yees los qhia qhov tshwm sim ceev muaj nuj nqi ntawm lub nce mus nce los (saib ntxiv). Nws yog ib tug smoothed version ntawm lub histogram thiab yog siv nyob rau hauv tib lub tswvyim
Dab tsi yog vim li cas ntawm qhov ntom ntom ntom?
Ntawm cov kua-cua sib cuam tshuam, qhov nro ntawm qhov chaw tshwm sim los ntawm kev nyiam ntawm cov kua molecules ntau dua rau ib leeg (vim kev sib koom ua ke) dua li cov molecules hauv huab cua (vim adhesion)
Dab tsi yog qhov txawv ntawm qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom nrog cov piv txwv?
Nws ua haujlwm nyob rau hauv ob qho tib si loj thiab me me thiab tsis yog raws li cov pej xeem ceev. Ceev dependent yam yog cov uas tswj cov kev loj hlob ntawm ib tug pej xeem nyob rau ntawm nws lub ceev thaum ceev ywj siab yam yog cov uas tswj pejxeem kev loj hlob yam tsis muaj nyob rau nws cov ceev
Dab tsi yog qhov ntom ntom thiab ntim muaj feem cuam tshuam li cas?
Ib yam khoom qhov ntom yog qhov piv ntawm qhov hnyav rau qhov ntim ntawm ib qho khoom. Qhov loj yog ntau npaum li cas nws resists acceleration thaum lub zog siv rau nws thiab feem ntau txhais tau tias ntau npaum li cas ntawm cov khoom los yog cov khoom muaj. Volume piav qhia qhov chaw ntau npaum li cas qhov khoom siv
Lub raj mis ntom ntom siv li cas los nrhiav qhov ntom ntawm cov kua?
Qhov loj thiab qhov loj ntawm cov molecules nyob rau hauv cov kua thiab ze npaum li cas lawv tau ntim ua ke txiav txim siab qhov ntom ntawm cov kua. Ib yam li cov khoom, qhov ntom ntawm cov kua sib npaug ntawm cov kua faib los ntawm nws qhov ntim; D = m/v. Qhov ceev ntawm cov dej yog 1 gram ib cubic centimeter