Video: Puas muaj zog acid thiab qaug zog hauv paus ua rau tsis muaj?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Raws li koj tau pom nyob rau hauv xam cov pH ntawm kev daws, tsuas yog ib tug me me ntawm a muaj zog acid Nws yog ib qho tsim nyog yuav tau hloov pauv pH. A tsis pub tsuas yog kev sib xyaw ua ke ntawm a qaug zog acid thiab nws conjugate puag los yog a tsis muaj zog puag thiab nws conjugate kua qaub . Buffers ua hauj lwm los ntawm reacting nrog tej yam ntxiv kua qaub los yog puag tswj pH.
Yog li, yuav ua li cas yog tias koj ntxiv cov kua qaub uas muaj zog rau qhov tsis muaj?
Yog ib muaj zog acid yog ntxiv rau a tsis pub , tus tsis muaj zog puag yuav hnov nrog tus H+ los ntawm lub zog acid ua form tus qaug zog kua qaub HA: H+ + A- → HA. Cov H+ tau absorbed los ntawm tus A- es tsis txhob reacting nrog dej los ua H3O+ (H+), yog tus pH hloov me ntsis.
Ib sab saum toj no, yuav ua li cas thiaj li tiv thaiv kev hloov pauv hauv pH nrog ntxiv ntawm cov kua qaub muaj zog? Buffers yog cov kev daws teeb meem uas tiv thaiv kev hloov pauv hauv pH , rau ntxiv ntawm me me ntawm kua qaub lub hauv paus. Lub kaus poom ua Qhov no vim hais tias lawv muaj ib qho acidic Cheebtsam, HA, rau neutralize OH- ions, thiab ib feem tseem ceeb, A-, mus neutralize H+ ions. Txij li thaum Kib yog qhov tsis tu ncua, [H+] yuav nyob ntawm qhov ratio ntawm [HA]/[A-].
Ua raws li qhov no, vim li cas koj thiaj li tsis tuaj yeem ua kom tsis muaj zog ntawm cov kua qaub HCl thiab muaj zog hauv paus NaOH)?
Piv txwv li, HCl ( muaj zog acid ) thiab NaOH ( lub hauv paus muaj zog ) yuav tshwm sim ua ke los ua H20 thiab NaCl (ntsev). Qhov no yog vim qhov tseeb tias yog koj ntxiv ib co muaj zog acid nws yuav tsuas hnov nrog lub conjugate ntsev, thiab yog hais tias koj ntxiv ib co muaj zog puag nws yuav teb nrog cov qaug zog acid.
Lub buffer ua li cas rau pH?
A tsis pub yog ib qho kev daws teeb meem uas tuaj yeem tiv taus pH hloov raws li qhov sib ntxiv ntawm cov kua qaub lossis cov khoom siv hauv paus. Nws muaj peev xwm neutralize me me ntawm ntxiv acid los yog hauv paus, yog li tswj cov pH ntawm cov tshuaj kuj ruaj khov.
Pom zoo:
Koj puas ntxiv cov kua qaub rau hauv lub hauv paus lossis lub hauv paus rau cov kua qaub?
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Yuav ua li cas tshwm sim thaum koj ntxiv ib tug qaug zog acid rau dej?
Thaum cov kua qaub uas tsis muaj zog ntxiv rau hauv dej, cov ntaub ntawv sib npaug sib npaug hauv cov kua qaub molecules, HA (aq), hnov mob nrog cov dej ua kua los tsim cov aqueous hydronium ions thiab aqueous anions, A-(aq). Cov tom kawg yog tsim thaum cov kua qaub molecules poob H + ions rau dej