Video: Koj pom li cas pH ntawm qhov sib npaug ntawm cov kua qaub thiab lub hauv paus muaj zog?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Nyob ntawm sib npaug point , sib npaug ntawm H+ thiab OH- ions yuav muab sib xyaw ua H2O, ua rau a pH ntawm 7.0 (neutral). Cov pH ntawm qhov sib npaug rau qhov no titration yuav ib txwm yog 7.0, nco ntsoov tias qhov no tsuas yog muaj tseeb rau titrations ntawm muaj zog acid nrog lub hauv paus muaj zog.
Hais txog qhov no, qhov sib npaug ntawm cov kua qaub thiab lub hauv paus tsis muaj zog yog dab tsi?
Hauv muaj zog acid - tsis muaj zog puag titrations , pH ntawm sib npaug point tsis yog 7 tab sis hauv qab nws. Qhov no yog vim kev tsim cov conjugate kua qaub thaum lub sij hawm titration ; Nws yuav hnov mob nrog dej los tsim hydronium (H3O+) cov.
Tsis tas li ntawd, koj yuav nrhiav pH ntawm qhov sib npaug li cas? Nyob rau hauv cov ntaub ntawv ntawm titration ntawm qaug zog acid nrog lub hauv paus muaj zog, pH ntawm sib npaug point yog txiav txim los ntawm qaug zog acid ntsev hydrolysis. Qhov ntawd txhais tau tias peb yuav tsum tau nrhiav pKb ntawm conjugated puag thiab xam concentration ntawm OH- pib los ntawm qhov ntawd, ces siv pH = 14 - POB qauv.
Yog li ntawd, puas yog tag nrho cov titrations ntawm lub hauv paus muaj zog nrog cov kua qaub muaj zog muaj pH tib yam ntawm qhov sib npaug?
Yog lawm, tag nrho lub hauv paus muaj zog - muaj zog acid titrations xaus nrog cov tib PH vim txoj kev sib hlub kua qaub thiab conjugate puag nyob nruab nrab. Yog lawm, tag nrho lub hauv paus muaj zog - muaj zog acid titrations xaus nrog cov tib PH vim tias tsuas muaj dej nyob hauv lub beaker ib zaug neutralization tiav.
Yuav ua li cas tshwm sim thaum muaj zog acid reacts nrog lub hauv paus muaj zog?
Qhov tseeb, thaum a muaj zog acid reacts nrog lub hauv paus muaj zog , cov khoom tshwm sim yog dej thiab ntsev ionic. Lwm qhov piv txwv ntawm xws li a tshuaj tiv thaiv yog tshuaj tshuaj tiv thaiv nruab nrab ntawm hydrochloric kua qaub (HCl) thiab potassium hydroxide (KOH).
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