Video: Yuav ua li cas yog tias ib qho me me ntawm cov kua qaub ntxiv rau hauv cov tshuaj buffered?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Nws yog tsim los ntawm kev sib xyaw ua ke loj ntim ntawm qaug zog kua qaub los yog qaug zog puag nrog nws conjugate puag los yog kua qaub . Thaum twg koj ntxiv me me ntawm ib kua qaub los yog alkali (puag) rau nws, nws cov pH ua tsis hloov loj. Hauv lwm lo lus, lub tsis daws nres cov kua qaub thiab pib los ntawm neutralizing ib leeg.
Tsis tas li ntawd nug, yuav ua li cas tshwm sim thaum cov kua qaub ntxiv rau cov tshuaj tsis haum?
Thaum muaj zog kua qaub (H3O+) yog ntxiv rau kev daws teeb meem lub conjugate puag tam sim no nyob rau hauv lub tsis pub siv cov hydronium ion hloov mus rau hauv dej thiab tsis muaj zog kua qaub ntawm conjugate base. Qhov no ua rau muaj qhov txo qis ntawm cov conjugate puag tam sim no thiab nce ntawm qhov tsis muaj zog kua qaub.
Ib tug kuj yuav nug, dab tsi yog qhov cuam tshuam ntawm dilution ntawm pH ntawm ib qho tsis thiab qhov tsis muaj peev xwm? Dilution txhais tau tias tsuas yog ntxiv dej xwb. Tsis yog li ntawd pH ntawm tsis pub tsis hloov thaum lub sij hawm dilution - nws maj mam hloov mus rau pH 7. Tab sis ntev npaum li qhov concentration ntawm tsis pub yog tsim nyog siab, pH yog ruaj khov heev.
Ntawm no, yuav ua li cas thiaj li tswj tau nws cov pH thaum me me ntawm cov kua qaub lossis cov hauv paus ntxiv rau nws?
Kev piav qhia: Buffers yog cov kev daws teeb meem tshwj xeeb uas cuam tshuam nrog ntxiv acid los yog puag txwv qhov kev hloov hauv pH qib. Piv txwv li, carbonic kua qaub yog ib tug qaug zog kua qaub uas ua tsis dissociate kiag li thaum nyob rau hauv dej - a me me yog dissociated rau hauv H + ions thiab hydrogen carbonate anions (conjugate puag ).
Yuav ua li cas thaum koj dilute ib tug buffer?
Kev piav qhia: Diluting ib tug tsis daws yuav txo nws tsis pub muaj peev xwm. Koj tuaj yeem pom tau yooj yim tias qhov kev hloov pauv ntawm pH tseem ceeb dua thaum cov concentrations ntawm acid thiab conjugate puag yog diluted.
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
Yuav siv cov tshuaj neutralization li cas los nrhiav cov concentration ntawm cov kua qaub?
Ib qho titration yog ib qho kev sim uas siv cov tshuaj tiv thaiv acid-base neutralization los txiav txim qhov tsis paub txog cov kua qaub lossis lub hauv paus. Qhov sib npaug taw tes yog mus txog thaum tus naj npawb ntawm hydrogen ions sib npaug rau tus naj npawb ntawm hydroxide ions
Yog vim li cas sodium poov tshuaj twj tso kua mis suav hais tias yog ib qho kev thauj mus los uas cov kev taw qhia yog cov sodium thiab poov tshuaj tau pumped?
Sodium-Potassium Pump. Kev thauj mus los yog lub zog xav tau cov txheej txheem ntawm kev siv cov molecules thiab ions hla daim nyias nyias 'nce toj' - tiv thaiv kev sib tw gradient. Txhawm rau txav cov molecules tawm tsam lawv cov concentration gradient, yuav tsum muaj cov khoom siv protein
Yuav ua li cas rau pH Thaum cov kua qaub ntxiv rau alkali?
Ntxiv dej rau cov kua qaub los yog lub hauv paus yuav hloov nws cov pH. Cov kua qaub los ua acidic tsawg. Ib yam li ntawd, thaum alkali diluted nrog dej, qhov concentration ntawm OH - ions txo. Qhov no ua rau pH ntawm alkali poob ntawm 7, ua rau cov tshuaj tsawg alkaline raws li cov dej ntxiv ntxiv