Video: Dab tsi yog qhov pH ntau ntawm cov tshuab tsis siv neeg feem ntau?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A ntau yam ntawm buffering systems muaj nyob rau hauv lub cev uas pab tswj lub pH ntawm cov ntshav thiab lwm cov kua dej hauv qhov nqaim ntau - nruab nrab pH 7.35 i 7.45 Nws. A tsis pub yog ib yam khoom uas tiv thaiv kev hloov pauv hauv cov kua dej pH los ntawm absorbing ntau hydrogen los yog hydroxyl ions.
Ib yam li ntawd, ntawm qhov pH yog qhov tsis zoo tshaj plaws?
Buffers feem ntau yog zoo tshaj qhov ntau pH = pKib ± 1. Cov ammonia tsis pub yuav yog siv tau nruab nrab pH = 8.24 – 10.24 TZS Cov acetate tsis pub yuav yog siv tau ntawm pH Qhov nruab nrab ntawm 3.74 mus rau 5.74. Sab nraud ntawm cov kab no, cov kev daws teeb meem tsis tuaj yeem tiv thaiv kev hloov pauv hauv pH los ntawm ntxiv muaj zog acids los yog bases.
Kuj Paub, vim li cas qhov tsis tuaj yeem ua haujlwm zoo tshaj plaws ntawm pH ze nws pKa? Lub peev xwm ntawm a tsis pub kev daws teeb meem kom muaj ze li qhov tas mus li pH thaum ib qho me me ntawm cov kua qaub los yog lub hauv paus ntxiv rau cov tshuaj yog qhov loj tshaj ntawm qhov pKa thiab diminishes li cov pH ntawm cov tshuaj mus rau saum toj los yog hauv qab lub pKa.
Hais txog qhov no, qhov ntau npaum li cas ntawm pH nplai?
Cov pH scale ranges 0 a14 pH ntawm 7 yog nruab nrab. A pH tsawg dua 7 yog acidic. A pH ntau dua 7 yog qhov yooj yim.
Lub buffer tswj pH li cas?
A Tsis pub daws tau tswj nws pH thaum me me ntawm H + thiab OH- ntxiv rau nws. Thaum H + ntxiv, lub hauv paus tivthaiv ntawm lub tsis pub yuav neutralize H + ntxiv li no tswj pH . Ib yam li thaum OH- ntxiv, cov kua qaub ntawm cov tsis pub yuav neutralize OH- thiab tswj pH.
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