Video: Qhov pH cuam tshuam li cas rau H + concentration?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov molar concentration Cov tshuaj yaj yeeb hydrogen ions hauv kev daws yog qhov ntsuas ntawm acidity. Qhov loj dua concentration , qhov ntau dua cov acidity. Qhov no concentration tuaj yeem muaj ntau yam zoo heev, los ntawm 10^-1 txog 10^-14. Yog li ib txoj hauv kev yooj yim los ntsuas qhov ntau yam no yog qhov pH scale uas txhais tau hais tias lub zog ntawm hydrogen.
Ib yam li ntawd, koj tuaj yeem nug, H + concentration cuam tshuam li cas rau pH?
Qhov siab dua H + concentration , qhov qis dua pH , thiab siab dua OH- concentration , qhov siab dua pH . Ntawm qhov nruab nrab pH ntawm 7 (dej ntshiab), lub concentration ntawm ob qho tib si H+ ions thiab OH- ions yog 10?7 M. Vim qhov kev cuam tshuam no, H+ thiab OH- muaj feem xyuam rau cov ntsiab lus ntawm cov kua qaub thiab cov hauv paus.
Tsis tas li ntawd, qhov concentration cuam tshuam li cas rau pH? Zuag qhia tag nrho concentration ntawm hydrogen ions yog inversely ntsig txog rau nws pH thiab tuaj yeem ntsuas ntawm qhov pH scale (Daim duab 1). Yog li ntawd, qhov ntau hydrogen ions tam sim no, qhov qis dua pH ; conversely, qhov tsawg dua hydrogen ions, qhov siab dua pH.
Tib neeg kuj nug, ua li cas koj hloov pH rau H + concentration?
Cov pH ntawm ib qho kev daws yog sib npaug rau lub hauv paus 10 logarithm ntawm lub H + concentration , muab faib ua -1. Yog koj paub cov pH ntawm kev daws dej, koj tuaj yeem siv cov qauv no rov qab los nrhiav cov antilogarithm thiab suav cov H + concentration nyob rau hauv qhov kev daws teeb meem. Cov kws tshawb fawb siv pH ntsuas seb cov dej acidic lossis cov dej yooj yim npaum li cas.
Qhov txawv ntawm H + concentration rau txhua chav pH yog dab tsi?
Hydrogen ion concentration ( pH ) A pH ntawm 7 yog nruab nrab. Ib tug txo nyob rau hauv pH Hauv qab no 7 qhia tau hais tias kev nce hauv acidity (hydrogen ions), thaum nce ntxiv pH saum toj no 7 qhia tau hais tias nce alkalinity (hydroxyl ions). Txhua pH unit sawv cev rau 10-fold hloov nyob rau hauv concentration.
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