Hauv cov kua qaub-tsis muaj zog hauv paus titrations, pH ntawm qhov sib npaug tsis yog 7 tab sis hauv qab nws . Qhov no yog vim kev tsim cov kua qaub conjugate thaum lub sij hawm titration; Nws yuav hnov mob nrog dej los tsim hydronium (H 3 O +) ions.
Dab tsi tuaj yeem ua rau pH ntawm titration txawv ntawm 7.0 ntawm qhov sib npaug?
qhov concentration ntawm cov txheej txheem daws teeb meem. Qhov sib npaug ntawm qhov titrations yuav txawv ntawm 7 vim yog ntsev hydrolysis.
Puas yog qhov sib npaug thaum nws nruab nrab?
1) Qhov sib npaug ntawm cov tshuaj tiv thaiv acid-puag (lub taw tes ntawm cov kua qaub thiab cov hauv paus tsuas yog txaus los ua kom tiav neutralization). 2) Cov pH ntawm cov tshuaj ntawm qhov sib npaug ntawm qhov sib npaug yog nyob ntawm lub zog ntawm cov kua qaub thiab lub zog ntawm lub hauv paus siv hauv titration.
Qhov twg hauv qab no muaj tseeb ntawm qhov sib npaug ntawm pH ib txwm yog 7?
Thiab thaum peb tab tom tham txog tus nqi, peb tab tom tham txog moles thaum lub sij hawm acid raws li dej. Qhov no muaj tseeb ntawm qhov sib npaug. Koj muaj cov moles sib npaug ntawm cov kua qaub thiab lub hauv paus ua ke ntawm qhov sib npaug taw tes. Tus pH ib txwm yog xya.
Koj paub li cas thaum koj mus txog qhov sib npaug?
Nyob rau hauv ob qho tib si, qhov sib npaug taw tes yog mus txog thaum moles ntawm cov kua qaub thiab lub hauv paus sib npaug thiab pH yog 7. Qhov no kuj sib xws rau cov ximhloov ntawm qhov ntsuas. … Ib qho titration nkhaus qhia cov pH hloov uas tshwm sim thaum lub sij hawm titration ntawm cov kua qaub nrog lub hauv paus. Ntawm sab laug, lub hauv paus tau ntxiv rau acid.
