Buffer, raws li peb tau hais tseg, yog qhov sib xyaw ntawm cov kab sib txuas ntawm cov kua qaub-puag uas tuaj yeem tiv thaiv kev hloov pauv hauv pH thaum me me ntawm cov acids muaj zog lossis cov hauv paus ntxiv. Thaum lub hauv paus muaj zog ntxiv, cov kua qaub tam sim no nyob rau hauv qhov tsis tuaj yeem ua rau cov hydroxide ions (OH -start superscript, pib ntawv, tsis zoo, ntawv kawg, ntawv sau kawg).
buffer tswj pH li cas?
Buffers ua haujlwm los ntawm kev ua kom tsis muaj cov kua qaub ntxiv (H + ions) lossis lub hauv paus (OH- ions)kom tswj tau cov pH nruab nrab, ua rau lawv tsis muaj zog acid lossis lub hauv paus. … Tam sim no, vim tias tag nrho cov H + ions ntxiv tau raug kaw thiab tau tsim cov kua qaub qis dua, NH4+, yog li pH ntawm lub cev tsis hloov pauv ntau.
buffers tiv thaiv kev hloov pauv hauv pH li cas?
A tsis yog ib qho tshuaj uas tiv thaiv kev hloov pauv hauv pH raws li qhov sib ntxiv ntawm me me ntawm cov kua qaub uas muaj zog lossis muaj zog hauv paus. … (Qee lub sij hawm cov tshuaj uas yog technically ib buffer tsis tiv thaiv cov kev hloov hauv pH. Qhov no tshwm sim thaum ntau cov kua qaub los yog cov hauv paus ntxiv rau qhov tsis uas lawv dhau los ua cov reactant ntau dhau.)
Cov kev daws teeb meem tsis hloov pH?
Buffers. Ib qho tsis muaj dej yog cov tshuaj aqueous uas muaj cov kua qaub tsis muaj zog thiab nws lub hauv paus conjugate los yog lub hauv paus tsis muaj zog thiab nws cov conjugate acid. Ib qho tsis muaj pH hloov me ntsis thaum me me ntawm cov kua qaub lossis cov hauv paus ntxiv rau nws. Nws yog siv los tiv thaiv kev hloov pauv hauv pH ntawm kev daws, tsis hais txog kev daws teeb meem.
Ua buffers tiv thaiv tam sim ntawdhloov pH?
Ib qhov tsis muaj zog yog cov kua qaub tsis muaj zog lossis lub hauv paus uas tiv thaiv kev hloov pauv saihauv pH.
