Video: Cov kua qaub puas muaj pH siab?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Txhua yam nrog qis heev pH yog acidic, thaum tshuaj nrog a siab pH yog alkaline. Nrog rau qhov ntawd hauv siab, lub pH scale ua kom muaj kev nkag siab ntau dua li kev ntsuas ntawm acidity. Acids muaj ob peb lub ntsiab lus sib txawv, tab sis tag nrho lawv yog cov khoom uas ua tau tsim hydrogen ions thaum nyob rau hauv ib tug tov.
Yog li ntawd, yog acid qis los yog siab pH?
Siab concentrations ntawm hydrogen ions yield a pH qis ( acidic tshuaj), hos qib qis ntawm hydrogen ions ua rau a siab pH (cov khoom siv hauv paus). Nws tsis yog acidic tsis yooj yim, thiab muaj a pH ua 7.0. Txhua yam hauv qab 7.0 (xws li 0.0 txog 6.9) yog acidic , thiab txhua yam saum toj no 7.0 (los ntawm 7.1 txog 14.0) yog alkaline.
pH ntawm cov kua qaub yog dab tsi? Cov pH scale ntsuas seb acidic los yog ib qho yooj yim cov khoom. Cov pH scale li ntawm 0 mus rau 14. A pH ntawm 7 yog nruab nrab. A pH tsawg dua 7 yog acidic.
Yog li ntawd, cov kua qaub muaj zog puas muaj pH siab?
Muaj zog Acids Feem ntau, a muaj zog acid ib pH ntawm zero rau 3. Txawm li cas los, vim pH ntsuas tus nqi ntawm hydrogen ions tso tawm hauv ib qho kev daws teeb meem, txawm tias ntau heev muaj zog acid tuaj yeem muaj pH siab nyeem yog tias nws cov concentration yog dilute heev. Piv txwv li, 0.0000001 molar HCl tov muaj ib pH ua 6,79.
Vim li cas cov hauv paus muaj pH siab?
Cov kua qaub yog Cov khoom uas muab hydrogen ions (H+) thiab qis dua pH , hos hauv paus muab hydroxide ions (OH–) thiab tsa pH . Qhov muaj zog cov kua qaub, qhov yooj yim dua nws pub H+.
Pom zoo:
Koj puas ntxiv cov kua qaub rau hauv lub hauv paus lossis lub hauv paus rau cov kua qaub?
Ntxiv cov kua qaub ua kom cov concentration ntawm H3O + ions hauv cov tshuaj. Ntxiv ib lub hauv paus txo cov concentration ntawm H3O + ions hauv cov tshuaj. Cov kua qaub thiab lub hauv paus zoo li cov tshuaj tiv thaiv. Yog hais tias lub hauv paus yog ntxiv rau cov kua qaub, cov tshuaj yuav tsis acidic thiab txav mus rau nruab nrab ntawm pH nplai
Puas yog cov hlau tsis ua rau cov kua qaub?
Feem ntau, cov non-metals tsis hnov mob nrog dilute acids. Qhov no yog vim hais tias thaum ib yam khoom reacts nrog acids, nws muab electrons rau H + ions uas ua los ntawm cov kua qaub. Cov hlau tsis muaj hlau yuav nquag tsis hnov mob nrog dej, txawm li cas los xij, cov hlau tsis yog hlau oxides yuav hnov mob nrog dej los tsim cov kua qaub
Puas muaj zog npaum li cas yog cov kua qaub los yog cov hauv paus daws teeb meem?
Qhov ntau ntawm 0 mus rau 14 muab kev ntsuas ntawm kev sib piv lub zog ntawm cov kua qaub thiab cov hauv paus daws teeb meem. Cov dej ntshiab thiab lwm cov kev daws teeb meem nruab nrab muaj tus nqi pH ntawm 7. Tus nqi pH tsawg dua 7 qhia tias cov kua qaub yog acidic, thiab pH tus nqi ntau dua 7 qhia tias cov tshuaj yog qhov yooj yim
Cov tshuaj ntxuav qhov cub puas yog cov kua qaub lossis cov hauv paus?
Ntau yam khoom siv tu, xws li xab npum thiab qhov cub ntxuav, yog cov hauv paus. Bases neutralize (tso tawm) acids. Alkalis yog cov hauv paus uas yaj hauv dej. Qhov ntau hydroxide ions ib lub hauv paus muaj, nws muaj zog dua
Yuav ua li cas koj txiav txim siab uas cov kua qaub muaj zog raws li pKa?
Siv "Lub zog tsis muaj zog ntawm cov kua qaub, lub zog ntawm lub hauv paus Conjugate" kom tau txais lub zog ntawm cov hauv paus los ntawm lub rooj pKa. Ntawm no yog lub hauv paus ntsiab lus tseem ceeb: Qhov kev txiav txim ntawm lub hauv paus lub zog yog qhov hloov pauv ntawm acid zog. Qhov tsis muaj zog acid, qhov muaj zog ntawm conjugate puag