Video: Qhov twg yog lub hauv paus muaj zog nh3 lossis h2o?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Yog li NH3 muaj cov muaj zog dua nyiam txais H+ dua H2O (lwm tus H2O yuav txais cov proton thiab ua raws li tus puag thiab cov NH3 yuav ua raws li ib tug acid, tab sis peb paub tias nws yog ib tug puag hauv H2O ).
Khaws qhov no hauv kev xav, vim li cas nh3 yog Lewis lub hauv paus muaj zog dua h2o?
H_2O yog a muaj zog Lewis puag vim tias qhov ntxiv hydrogen hauv NH_3 tiv thaiv ib leeg ntawm lub hauv paus nitrogen atom. H2O yuav tsum yog a muaj zog Lewis puag vim oxygen yog electronegative ntau dua tshaj nitrogen. NH_3 yuav tsum yog a muaj zog Lewis puag vim nitrogen yog ntau electronegative tshaj oxygen.
Ib yam li ntawd, nh3 puas yog lub hauv paus muaj zog lossis tsis muaj zog? Ammonium yog ib qaug zog acid, tab sis conjugate puag ammonium yog ammonia, NH3 ,qus a lub hauv paus muaj zog . NH3 yog a tsis muaj zog puag . NH2-, lub npe hu ua amide ion yog ib qho muaj zog heev puag.
Ib yam li ntawd, yog nh3 yooj yim dua li h2o?
Dej lees txais ib qho proton los ntawm kev sib koom ua ke oxygen ib leeg. Nitrogen yog tsawg electronegative tshaj oxygen thiab yuav yog ntau txaus siab qhia tus khub. Yog li ammonia yog lub hauv paus muaj zog dua dej , thiab ammonium ion (NH4) yog ib qho tsis muaj zog acid tshaj Hydronium ion (H3O).
Dab tsi yog acidic ammonia ntau dua los yog dej?
Dej yuav tsum muaj zog kua qaub tshaj ammonia , uas yuav tsum yog ntau acidic tshaj li methane. Qhov tseeb, pKa ntawm hydrogen fluoride yog 4; uas ntawm dej yog 15;. uas ntawm ammonia yog 35;. thiab methane yog li 50. Dej yog ntau ntau acidic tshaj ammonia , uas yog ntau ntau acidic tshaj li methane.
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
Muaj pes tsawg guanine bases puas yog 50 lub hauv paus khub ob txoj hlua DNA 100 bases tag nrho muaj yog tias nws muaj 25 adenine bases?
Yog li, muaj tag nrho ntawm 25 + 25 = 50 adenine thiab thymine hauv tag nrho. Qhov ntawd tawm 100− 50 = 50 seem hauv paus. Nco ntsoov tias cytosine thiab guanine daim ntawv cog lus nrog ib leeg, thiab yog li lawv sib npaug ntawm cov nyiaj. Tam sim no peb tuaj yeem faib los ntawm 2 kom tau txais tus lej ntawm guanine lossis cytosine hauv paus
Puas muaj zog acid thiab qaug zog hauv paus ua rau tsis muaj?
Raws li koj tau pom hauv kev suav cov pH ntawm cov kev daws teeb meem, tsuas yog ib qho me me ntawm cov kua qaub uas muaj zog heev yog qhov tsim nyog los hloov pH. Ib qho tsis yog tsuas yog sib xyaw ntawm cov kua qaub tsis muaj zog thiab nws lub hauv paus conjugate lossis lub hauv paus tsis muaj zog thiab nws cov conjugate acid. Buffers ua hauj lwm los ntawm reacting nrog ib qho ntxiv acid los yog hauv paus tswj pH
Thaum twg muaj zog acid yog titrated nrog lub hauv paus tsis muaj zog?
Titration ntawm lub hauv paus tsis muaj zog nrog lub zog acid. Nyob rau hauv ib qho tsis muaj zog hauv paus-muaj zog acid titration, cov kua qaub thiab lub hauv paus yuav hnov mob los tsim cov kua qaub. Lub conjugate acid yuav raug tsim thaum lub sij hawm titration, uas tom qab ntawd reacts nrog dej los tsim hydronium ions. Qhov no ua rau muaj kev daws teeb meem nrog pH qis dua 7
Pawg ua haujlwm twg yog lub hauv paus tsis muaj zog?
Amines, ib qho nruab nrab nitrogen nrog peb daim ntawv cog lus rau lwm cov atoms (feem ntau yog carbon lossis hydrogen), yog cov pab pawg ua haujlwm zoo hauv cov organic tsis muaj zog hauv paus