Video: Yuav ua li cas koj xam pH ntawm h3o + thiab vice versa?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Rau xam pH los ntawm cov molar concentration ntawm ib tug acid, coj lub feem cav ntawm lub H3O + ion concentration, thiab ces muab faib los ntawm -1: pH = - log( H3O +).
Ua raws li qhov xav tau, koj ua li cas suav h3o los ntawm pH?
Rau xam tus pH ntawm cov kua dej aqueous koj yuav tsum paub qhov concentration ntawm hydronium ion hauv moles ib liter (molarity). Cov pH yog ces xam siv cov lus: pH = - log [ H3O+ ].
Ib yam li ntawd, tus qauv rau pH yog dab tsi? Cov mis rau pH yog pH = -log[H+]. Qhov no txhais tau tias pH yog lub hauv paus tsis zoo 10 logarithm ("log" ntawm lub tshuab xam zauv) hydrogen ion concentration ntawm kev daws. Txhawm rau xam nws, nqa lub cav ntawm lub hydrogen ion concentration thiab thim rov qab kos npe kom tau txais cov lus teb.
Ib tug kuj yuav nug, pH cuam tshuam li cas rau h30+?
Kev daws ntawm pH 0 yog acidic heev. Ib qho kev daws teeb meem ntawm pH 14 yog alkaline heev (piv txwv). Piv txwv li, yog ib qho kev daws teeb meem muaj a pH ntawm 3, nws [H3O+] yog 10 M, lossis 0.001 M. Vim pH yog ntsig txog rau lub zog ntawm 10, kev hloov hauv ib qho pH chav tsev sib raug mus rau kaum qhov kev hloov pauv hauv cov ntsiab lus ntawm hydroxide thiab hydronium ions.
Puas yog pH tsis zoo?
Nws yog twv yuav raug hu ua laib a pH tsis zoo tus nqi. Hauv kev xyaum, txhua cov kua qaub uas ua rau muaj qhov concentration ntawm hydrogen ions nrog molarity ntau dua 1 yuav raug suav kom muaj pH tsis zoo . Piv txwv li, lub pH ntawm 12M HCl (hydrochloric acid) yog xam los ua -log(12) = -1.08.
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