Cov txheej txheem:

Yuav ua li cas koj pom qhov sib npaug ntawm qhov nqus ntawm qhov nqus?
Yuav ua li cas koj pom qhov sib npaug ntawm qhov nqus ntawm qhov nqus?

Video: Yuav ua li cas koj pom qhov sib npaug ntawm qhov nqus ntawm qhov nqus?

Video: Yuav ua li cas koj pom qhov sib npaug ntawm qhov nqus ntawm qhov nqus?
Video: Yuav ua li cas qhov tsos thiaj dawb! DIY How to Lighten Dark Underarms! 2024, Kaum ib hlis
Anonim

X = [Fe(SCN)2+] thiab yuav tsum tau txiav txim los ntawm tus qauv nkhaus. Koj mam li xam cov equilibrium tsis tu ncua , Keq , siv cov kev sib npaug concentrations. Tus qauv nkhaus yog ib zajlus ntawm Absorbance versus [Fe(SCN)2+] (Daim duab 8.1). Nws tuaj yeem siv los muab peb cov concentration ntawm kev daws teeb meem thaum muab cov absorbance.

Ua kom pom qhov no, koj yuav ua li cas thiaj nrhiav tau qhov sib npaug ntawm qhov nqus ntawm qhov nqus?

Yog li ntawd, [Fe(SCN)2+]ua eq tuaj yeem txiav txim ncaj qha los ntawm absorbance kev ntsuas. Equilibrium concentrations ntawm cov reactants tuaj yeem xam los ntawm kev rho tawm equilibrium concentration ntawm qhov khoom los ntawm qhov pib concentrations ntawm cov reactants.

Qhov thib ob, FeSCN yog dab tsi? Cov FeSCN 2+ complex uas yog tsim los ntawm cov tshuaj tiv thaiv ntawm hlau (III) thiab thiocyanate ions muaj ib tug heev khaus ntshav liab xim (los yog txiv kab ntxwv nyob rau hauv dilute tov), tso cai rau kom yooj yim nrhiav tau thiab txiav txim kom muaj nuj nqis los ntawm spectrophotometric. Reactants (Fe3+ thiab SCN-) xyaum tsis muaj xim.

Ua li no, koj yuav pom qhov sib npaug li cas los ntawm Beer txoj cai lij choj?

equilibrium concentration ntawm cov khoom

  1. [FeSCN2+] ntawm qhov sib npaug yog txiav txim siab siv Beer Txoj Cai; x yog tus nqi ntawm FeSCN2+ tsim (txiav txim siab sim).
  2. x = [FeSCN 2+] ua eq =
  3. a.
  4. Siv Eq.
  5. Nrhiav tus nqi nruab nrab ntawm Kua eq, tus qauv sib txawv, thiab cov txheeb ze yuam kev (tus qauv sib txawv muab faib los ntawm qhov nruab nrab).

KEQ txhais li cas?

Keq tsuas yog qhia koj yam uas yuav nyiam ntawm kev sib npaug. Txij li thaum Keq = [products]/[reactants] tus nqi loj ntawm k (k>> 1) txhais tau tias cov tshuaj tiv thaiv yuav nyiam cov khoom ntau dua, txhais tau tias thaum cov tshuaj tiv thaiv mus txog qhov sib npaug koj yuav muaj feem ntau cov khoom.

Pom zoo: