Buffers. Ib qho tsis yog cov tshuaj aqueous muaj cov kua qaub tsis muaj zogthiab nws lub hauv paus conjugate lossis lub hauv paus tsis muaj zog thiab nws cov kua qaub sib txuas. Lub pH tsis hloov pauv me me thaum me me ntawm cov kua qaub uas muaj zog lossis cov hauv paus ntxiv rau nws.
Puas yog ib txwm tsis muaj kua qaub?
Ib lub kua qaub tsis muaj zog ib leeg tsis yog qhov tsis muaj, vim tias tsis muaj qhov tsim nyog ntawm lub hauv paus conjugate. Buffers tsis tuaj yeem tsim los ntawm cov kua qaub (lossis muaj zog hauv paus) thiab nws cov conjugate. Qhov no yog vim lawv ionize kiag li! Nws yog ib qho tseem ceeb kom muaj peev xwm paub txog cov kev daws teeb meem tsis sib haum!
Puas yog qhov tsis muaj zog?
Yuav ua li cas los xij, qhov tsis yog sib xyaw ntawm cov kua qaub tsis muaj zog thiab nws lub hauv paus conjugate lossis lub hauv paus tsis muaj zog thiab nws cov kua qaub sib xyaw.
Vim li cas cov kua qaub tsis muaj zog zoo dua?
Yuav ua li cas sib tov ntawm cov kua qaub tsis muaj zog thiab nws lub hauv paus conjugate pab tsis tau cov tshuaj tiv thaiv pH hloov? Yog tias peb sib xyaw cov kua qaub tsis muaj zog (HA) nrog nws lub hauv paus conjugate (A-), ob qho tib si cov kua qaub thiab lub hauv paus tseem nyob hauv cov tshuaj. Qhov no yog vim lawv tsis dhau qhov kev cuam tshuam uas hloov pauv lawv cov concentrations
Puas yog cov kua qaub tsis muaj zog thiab lub hauv paus tsis muaj zog tuaj yeem ua tsis tau?
Buffers. Ib qho tsis muaj dej yog cov tshuaj aqueous uas muaj cov kua qaub tsis muaj zog thiab nws lub hauv paus conjugatelossis lub hauv paus tsis muaj zog thiab nws cov kua qaub. Lub pH tsis hloov pauv me me thaum me me ntawm cov kua qaub uas muaj zog lossis cov hauv paus ntxiv rau nws.
