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Video: Koj ua pov thawj li cas Henderson Hasselbalch kab zauv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Deriving Henderson-Hasselbalch Equation
- Siv cov tshuaj tiv thaiv ionization ntawm cov kua qaub tsis muaj zog (HA):
- Lub dissociation tas li Ka ntawm cov lus teb saum toj no yuav yog:
- Tom qab ntawd los ntawm kev sib npaug (2) tshem tawm [H?] mus rau sab laug (daws rau H?):
- Hloov cov pH thiab pKa hauv lub kev sib npaug (4):
Ib yam li ntawd, Henderson equation hauv chemistry yog dab tsi?
Kho tshiab Lub yim hli ntuj 10, 2019. The Henderson Hasselbalch kev sib npaug yog kwv yees kev sib npaug uas qhia txog kev sib raug zoo ntawm pH lossis pOH ntawm kev daws thiab pKa lub pkb thiab qhov ratio ntawm cov concentrations ntawm dissociated tshuaj hom.
Ib yam li ntawd, pKa txhais li cas? Cov ntsiab lus tseem ceeb: pKa txhais Cov pKa tus nqi yog ib txoj kev siv rau qhia lub zog ntawm ib tug acid. pKa yog lub cav tsis zoo ntawm cov kua qaub dissociation tas li los yog Ka tus nqi. Ib qho qis pKa tus nqi qhia tias muaj zog acid. Ntawd yog, tus nqi qis dua qhia tias cov kua qaub ntau dissociates hauv dej.
Ua raws li qhov xav tau, pKa formula yog dab tsi?
pKa yog txhais li -log10 Ka qhov twg Ka = [H+[A-] / [HA]. Los ntawm cov kab lus no nws muaj peev xwm muab tau Henderson-Hasselbalch kev sib npaug uas yog. pKa = pH + log [HA] / [A-] Qhov no qhia peb tias thaum pH = pKa then log [HA] / [A-] = 0 so [HA] = [A-] piv txwv li qhov sib npaug ntawm ob daim ntawv.
Puas yog dej tsis haum?
Dej yog a tsis pub txawm yog tus pluag. Qhov no yog vim H20 pom ionises los ua H30+ thiab OH-. Tsim kom muaj acidic buffer tsis koj xav tau ib tug qaug zog acid nrog lub conjugate puag. Raws li yuav muaj hydronium thiab hydroxide ions tam sim no yog nws ua raws li ib tug tsis pub tab sis yog ib qho txaus ntshai.
Pom zoo:
Koj ua pov thawj li cas cov kab yog sib npaug hauv cov ntawv pov thawj?
Thawj yog yog tias cov ces kaum sib thooj, cov ces kaum uas nyob rau tib lub ces kaum ntawm txhua qhov kev sib tshuam, sib npaug, ces cov kab sib npaug. Qhov thib ob yog yog tias qhov sib txawv sab hauv lub kaum sab xis, cov ces kaum uas nyob rau sab nraud ntawm lub transversal thiab sab hauv cov kab sib npaug, sib npaug, ces cov kab sib npaug
Dab tsi pov thawj siv cov duab ntawm lub dav hlau sib koom ua pov thawj cov khoom geometric?
Cov ntaub ntawv pov thawj uas siv cov duab ntawm lub dav hlau sib koom ua pov thawj geometric zog yog hu ua trigonometric
Puas yog cov kab sib txuas ua pov thawj cov kab sib txuas?
Thawj yog yog tias cov ces kaum sib thooj, cov ces kaum uas nyob rau tib lub ces kaum ntawm txhua qhov kev sib tshuam, yog sib npaug, ces cov kab sib npaug. Qhov thib ob yog yog tias qhov sib txawv sab hauv lub kaum sab xis, cov ces kaum uas nyob rau sab nraud ntawm lub transversal thiab sab hauv cov kab sib npaug, sib npaug, ces cov kab sib npaug
Yuav ua li cas los hloov ib tug quadratic kab zauv los ntawm vertex daim ntawv rau lub tshuab xam zauv?
Lub laij lej rau kev hloov pauv los ntawm daim ntawv yooj yim mus rau vertex daim ntawv y = x2 + 3x + 5. x2 + 3x + 5 = || +(p2)2-(p2)2=0. || a2+2ab+b2=(a+b)2. || -1⋅-1=+1. xS=-32=-1.5. yS=-(32)2+5=2.75
Koj ua pov thawj li cas ob kab yog coincident?
Yog hais tias ib kab yog sau li Ax + By = C, lawv-intercept yog sib npaug rau C / B. Yog hais tias txhua kab hauv qhov system muaj tib txoj kab nqes tab sis sib txawv y-intercept, cov kab sib npaug thiab tsis muaj kev daws teeb meem. Yog hais tias txhua kab nyob rau hauv lub system muaj tib txoj kab nqes thiab tib y-intercept, cov kab yog coincident