Video: Vim li cas cov kua qaub tsis muaj zog?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Ib kua qaub yog qaug zog yog tsis yog tag nrho cov kua qaub molecules ionize rau hauv hydrogen protons thiab nws cov conjugate puag nyob rau hauv ib qho kev hnyav system. Hloov pauv, yog tias peb yuav tsum siv qhov dav dav, Brønsted txhais, ib kua qaub yog qaug zog yog tias nws tsis ua tiav lossis ze li tag nrho pub nws cov proton rau qee lub hauv paus.
Ib yam li ntawd, dab tsi ua rau qaug zog acid tsis muaj zog?
A qaug zog acid yog ib kua qaub uas ib nrab dissociates rau hauv nws ions nyob rau hauv ib tug aqueous tov los yog dej. Lub conjugate puag ntawm a qaug zog acid yog a qaug zog base, thaum lub conjugate kua qaub ntawm a qaug zog base yog a qaug zog acid . Nyob rau tib lub concentration, tsis muaj zog acids muaj pH ntau dua muaj zog acids.
Tsis tas li ntawd, vim li cas cov kua qaub tsis muaj zog tsis sib haum xeeb? A qaug zog acid yog ib qho tsis dissociate kiag li hauv kev daws; qhov no txhais tau tias a tsis muaj zog acid pub tag nrho nws cov hydrogen ions (H+) hauv kev daws teeb meem. Yog li ntawd, qhov concentration ntawm H+ ions hauv a qaug zog acid kev daws yog ib txwm tsawg tshaj li qhov concentration ntawm hom undissociated, HA.
Raws li qhov no, vim li cas acetic acid tsis muaj zog?
Acetic acid , zoo li lwm yam organic kua qaub , dissociates tsuas sparingly nyob rau hauv dej piv rau muaj zog kua qaub . Acetic acid yog a qaug zog acid vim nws tsis dissociate heev nyob rau hauv kev daws, lub ntsiab lus muaj ntau ntau ntxiv tag nrho cov molecules ntawm acetic acid tshaj cais acetate thiab hydrogen ions.
Cov acids tsis muaj zog siv rau dab tsi?
A qaug zog acid yog ib kua qaub uas tsis tsim ntau hydrogen ions thaum nyob rau hauv aqueous tov. Tsis muaj kua qaub muaj tus nqi pH tsawg thiab yog siv rau neutralize lub hauv paus muaj zog. Piv txwv ntawm tsis muaj zog acids muaj xws li: acetic kua qaub (xws li vinegar), lactic kua qaub , citric qab kua qaub , thiab phosphoric kua qaub.
Pom zoo:
Cov kua qaub tsis muaj pKa siab lossis qis?
001) = -3 yog li pKa = 3. Yog li pKa siab dua Ka, thiab qhov no txhais tau tias tsis muaj zog acid
Vim li cas los nag yog ib txwm acidic tab sis tsis yog tag nrho cov nag raug cais ua kua qaub?
Ntuj Los: Dej nag 'Li qub' yog me ntsis acidic vim tias muaj cov kua carbonic acid yaj. Cov pa roj ntawm cov leej faj oxides thiab nitrogen oxides tau hloov pauv mus ua sulfuric thiab nitric acids. Cov roj uas tsis yog hlau oxide hnov mob nrog dej los tsim cov kua qaub (ammonia ua lub hauv paus)
Koj yuav txiav txim siab li cas yog tias cov kua qaub muaj zog lossis tsis muaj zog?
Yog hais tias ib qho acid tsis tau teev tseg ntawm no, nws yog ib qho tsis muaj zog acid. Nws tuaj yeem yog 1% ionized lossis 99% ionized, tab sis nws tseem raug cais raws li cov kua qaub tsis muaj zog. Txhua cov kua qaub uas dissociates 100% rau hauv ions yog hu ua ib tug muaj zog acid. Yog hais tias nws tsis dissociate 100%, nws yog ib tug qaug zog acid
Cov kua qaub npe li cas thaum koj siv hydro thiab thaum tsis?
Thawj qhov uas yuav tsum nco ntsoov yog tias, vim tias cov no tsis yog binary acids, koj tsis siv lub npe 'hydro' thaum naming lawv. Lub npe ntawm cov kua qaub los ntawm qhov xwm ntawm anion. Yog tias lub npe ntawm ion xaus rau '-ate,' hloov nws mus rau '-ic' thaum naming cov kua qaub
Vim li cas cov duab ntawm titration nkhaus txawv rau titration ntawm muaj zog acid vs muaj zog puag thiab qaug zog acid vs muaj zog puag?
Cov duab dav dav ntawm titration nkhaus yog tib yam, tab sis pH ntawm qhov sib npaug sib txawv. Hauv qhov tsis muaj zog acid-muaj zog titration, pH yog ntau dua 7 ntawm qhov sib npaug. Hauv qhov muaj zog acid-tsis muaj zog titration, pH tsawg dua 7 ntawm qhov sib npaug