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Koj pom molarity li cas los ntawm qhov ntom thiab feem pua?
Koj pom molarity li cas los ntawm qhov ntom thiab feem pua?

Video: Koj pom molarity li cas los ntawm qhov ntom thiab feem pua?

Video: Koj pom molarity li cas los ntawm qhov ntom thiab feem pua?
Video: Tsis tau sib yuav vim nraug kev deb 9/22/2017 2024, Kaum ib hlis
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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

  1. Nrhiav cov molar loj ntawm tag nrho cov ntsiab nyob rau hauv lub compound ingrams ib mole.
  2. Nrhiav cov molecular loj ntawm tag nrho cov compound.
  3. Faib cov khoom molar mass los ntawm tag nrho cov molecularmass.
  4. 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?

  1. Moles thiab Molar daws (unit = M = moles / L)
  2. Kev daws teeb meem feem pua (% = seem ib puas lossis grams / 100 ml)
  3. 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.

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