Acid buffer muaj acidic pH thiab npaj los ntawm kev sib xyaw cov kua qaub tsis muaj zog thiab nws cov ntsev nrog lub hauv paus muaj zog. Ib qho kev daws teeb meem ntawm qhov sib npaug ntawm acetic acid thiab sodium acetate muaj pH ntawm 4.74. … Ib qho piv txwv ntawm cov tshuaj acidic buffer yog sib tov ntawm sodium acetate thiab acetic acid (pH=4.75).
Puas yog buffers acidic lossis yooj yim?
Ib qho kev daws teeb meem yuav muaj pH siab dua 7.0, thaum cov kua qaub yuav muaj pH qis dua 7.0. Buffers yog cov kev daws teeb meem uas muaj tsis muaj kua qaub thiab nws lub hauv paus conjugate; xws li, lawv tuaj yeem nqus tau H+ions lossis OH– ions, yog li tswj hwm tus pH tag nrho hauv cov tshuaj.
Dab tsi yog acidic buffer thiab yooj yim buffer?
Acidic buffers yog cov tshuaj uas muaj pH qis dua 7 thiab muaj cov kua qaub tsis muaj zog thiab ib qho ntawm nws cov ntsev. … Alkaline buffers, ntawm qhov tod tes, muaj pH saum 7 thiab muaj lub hauv paus tsis muaj zog thiab ib qho ntawm nws cov ntsev. Piv txwv li, kev sib xyaw ntawm ammonium chloride thiab ammonium hydroxide ua raws li cov tshuaj tsis haum nrog pH txog 9.25.
pH daws teeb meem yog dab tsi?
A cov tshuaj tsis haum (ntau dua, pH tsis yog lossis hydrogen ion buffer) yog cov tshuaj aqueous uas muaj cov sib xyaw ntawm cov kua qaub tsis muaj zog thiab nws lub hauv paus sib xyaw, lossis rov ua dua. … Cov kev daws teeb meem tsis yog siv los ua ib txoj hauv kev ua kom pH ntawm tus nqi yuav luag tas li hauv ntau yam kev siv tshuaj.
Yuav ua li cas thiaj paub yog qhov kev daws teeb meem?
Yog cov concentrationsntawm cov kua qaub tsis muaj zog thiab nws lub hauv paus conjugate yog qhov tsim nyog siab, ces cov tshuaj tiv thaiv kev hloov pauv hauv hydrogen ion concentration. Cov kev daws teeb meem no hu ua buffers.
