Video: Puas muaj zog npaum li cas yog cov kua qaub los yog cov hauv paus daws teeb meem?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qhov ntau ntawm 0 txog 14 muab qhov ntsuas ntawm qhov sib piv ntawm lub zog kua qaub thiab kev daws teeb meem . Dej ntshiab thiab lwm yam nruab nrab kev daws teeb meem muaj pH tus nqi ntawm 7. Tus nqi pH tsawg dua 7 qhia tias qhov daws yog acidic , thiab tus nqi pH ntau dua 7 qhia tias qhov daws yog yooj yim.
Nyob rau hauv txoj kev no, muaj zog npaum li cas yog cov kua qaub lossis cov ntsiab lus hauv chav kawm 10?
Ib yam li ntawd hauv paus ua rau ntau OH- ions yog lub hauv paus muaj zog hos cov uas ua rau kom tsawg OH-ions raug hu ua qaug zog hauv paus . Salts ib muaj zog acid thiab a lub hauv paus muaj zog yog nruab nrab nrog tus nqi pH ntawm 7. Cov ntsev ntawm muaj zog acid thiab qaug zog puag yog acidic nrog pH tus nqi tsawg dua 7.
Tsis tas li ntawd, lub zog ntawm cov kua qaub yog dab tsi? Acid zog hais txog qhov nyiam ntawm ib qho kua qaub , cim los ntawm cov tshuaj formula HA, kom dissociate rau hauv ib tug proton, H+, thiab anion, A−. HA ⇌ H+ + A−. Acetic kua qaub (CH3COOH) yog ib qho piv txwv ntawm tus qaug zog kua qaub . Cov zog ntawm qaug zog kua qaub yog quantified los ntawm nws kua qaub dissociation tas li, pKa tus nqi.
Ntawm no, dab tsi ua rau acid zog lossis qaug 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. Piv txwv li, a muaj zog acid tag nrho dissociates rau hauv nws cov ions hauv dej. Nyob rau tib lub concentration, tsis muaj zog acids muaj pH ntau dua muaj zog acids.
Lub Fullform ntawm pH yog dab tsi?
PH stands rau Potential ntawm Hydrogen. Nws yog hais txog hydrogen ion concentration hauv cov tshuaj. Nws yog qhov ntsuas ntawm acidity los yog alkalinity ntawm cov kua. Cov PH tus nqi yog li ntawm 0 txog 14 ntawm a pH nplai.
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
Yuav ua li cas koj txiav txim siab npaum li cas ntawm cov kua qaub uas yuav tsum tau neutralize lub hauv paus?
Kev daws qhov teeb meem Acid-Base Neutralization Kauj Ruam 1: Muab xam cov moles ntawm OH-. Molarity = moles / ntim. moles = Molarity x Volume. moles OH- = 0.02 M/100 milliliters. Kauj ruam 2: Xam qhov ntim ntawm HCl xav tau. Molarity = moles / ntim. Volume = moles/molarity. Volume = moles H+/0.075 Molarity
Peb siv cov kua qaub thiab cov hauv paus hauv lub neej txhua hnub li cas?
Cov tshuaj txhuam hniav thiab tshuaj tiv thaiv kab mob yog cov piv txwv zoo ntawm cov khoom lag luam thaum cov khoom noj xws li kua txiv kab ntxwv lossis txiv kab ntxwv yog cov kua qaub heev. Qhov ntsuas pH. Lub pH nplai khiav los ntawm 1 txog 14 thiab qhia txog ntau yam ntawm cov kua qaub thiab cov hauv paus ntawm sab saum toj mus rau hauv qab. Tshuaj txhuam hniav thiab pH. pH ntawm cov khoom noj khoom haus. Acid Neutralizing Tshuaj. Cov khoom siv ntxuav
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
Koj pom li cas pH ntawm qhov sib npaug ntawm cov kua qaub thiab lub hauv paus muaj zog?
Ntawm qhov sib npaug, qhov sib npaug ntawm H + thiab OH- ions yuav sib xyaw ua H2O, ua rau pH ntawm 7.0 (tsis nruab nrab). Lub pH ntawm qhov sib npaug ntawm qhov sib npaug ntawm qhov titration yuav ib txwm yog 7.0, nco ntsoov tias qhov no tsuas yog muaj tseeb rau titration ntawm cov kua qaub muaj zog nrog lub hauv paus muaj zog