Video: Vim li cas cov duab ntawm titration nkhaus txawv rau titration ntawm muaj zog acid vs muaj zog puag thiab qaug zog acid vs muaj zog puag?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Tus general puab ntawm titration nkhaus yog tib yam, tab sis pH ntawm qhov sib npaug yog txawv . Hauv ib qaug zog acid - muaj zog puag titration , pH ua yog ntau dua 7 ntawm qhov sib npaug. Hauv ib muaj zog acid - tsis muaj zog puag titration , pH ua yog tsawg dua 7 ntawm qhov sib npaug.
Ib yam li ntawd, tib neeg nug, yuav ua li cas tsis muaj zog acid titration nkhaus txawv ntawm qhov muaj zog acid?
Hauv ib kua qaub - puag titration , cov titration nkhaus qhia txog qhov muaj zog ntawm qhov sib xws kua qaub thiab base. Yog ib tug reagent yog ib tug tsis muaj zog acid los yog puag thiab lwm yam yog ib muaj zog acid lub base, lub titration nkhaus yog irregular, thiab cov pH hloov tsawg dua nrog me me ntxiv ntawm titrant ze ntawm qhov sib npaug.
Ib sab saum toj no, qhov twg titration yog nruab nrab ntawm lub zog acid thiab lub hauv paus muaj zog? Nyob rau hauv ib tug muaj zog acid-muaj zog puag titration, cov kua qaub thiab lub hauv paus yuav hnov mob los tsim ib qho kev daws teeb meem. Ntawm sib npaug point ntawm cov tshuaj tiv thaiv, hydronium (H +) thiab hydroxide (OH-) ions yuav hnov mob tsim dej, ua rau pH ntawm 7. Qhov no yog qhov tseeb ntawm txhua qhov muaj zog acid-muaj zog titrations.
Ua raws li qhov no, vim li cas pH ntawm cov kua qaub tsis muaj zog thiab lub hauv paus titration muaj zog ntau dua 7?
Yog koj titrate ib qaug zog acid (e.g. CH3COOH) nrog a lub hauv paus muaj zog (piv txwv li NaOH) cov ntsev tsim (piv txwv li CH3COONa) yog yooj yim thiab lub conjugate puag los ntawm ntsev (CH3COO-) reacts nrog dej. Yog li cov tshuaj uas tsim tawm yog weakly alkaline thiab cov pH ntawm qhov sib npaug point yuav ntau dua 7.
Vim li cas nws zoo dua los siv cov kua qaub tsis muaj zog los titrate lub hauv paus?
Muaj kev nce siab hauv pH thaum pib ntawm lub titration . Qhov no yog vim lub anion ntawm lub qaug zog acid ua ib qho ion uas txo cov ionization ntawm cov kua qaub . Tom qab lub ntse nce nyob rau hauv thaum pib ntawm lub titration qhov nkhaus tsuas hloov maj mam. Qhov no yog vim qhov kev daws teeb meem ua raws li qhov tsis muaj.
Pom zoo:
Dab tsi yog qhov muaj zog thiab qaug zog acid piav nrog piv txwv?
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Dab tsi yog qhov qaug zog acid thiab muaj zog puag tsim?
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