Qhov twg ua rau muaj kev daws teeb meem?

2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07

Nug: Qhov twg ua rau muaj kev daws teeb meem? Akev daws teeb meem uas muaj cov kua qaub muaj zog thiab nws lub hauv paus conjugate A tov uas muaj lub hauv paus muaj zog thiab nws cov conjugate acidCov tshuaj uas muaj cov catalyst A cov tshuaj muaj ob cov kua organic A tov uas muaj cov kua qaub tsis muaj zog thiab nws cov conjugate base.

Yuav ua li cas sib tov hauv qab no yuav ua rau muaj kev daws teeb meem?

HNO₃ yog cov kua qaub. NaF yog ntsev ntawm cov kua qaub tsis muaj zog. Cov concentration ntawm cov kua qaub muaj zog yog tsawg dua li cov concentration ntawm cov tsis muaj zog acid. Li no qhov no yuav tsim ib qho kev daws teeb meem.

Cov kev daws teeb meem dab tsi ua buffers?

Buffers tuaj yeem tsim los ntawm tsis muaj kua qaub lossis lub hauv paus thiab lawv cov ntsev . Piv txwv li, yog 12.21 grams ntawm sodium benzoate yaj nyob rau hauv 1.00 L 0.100 M benzoic acid (C₆H_{5COOH, pK} a_{=4.19) kev daws, qhov tsis muaj pH ntawm 4.19 yuav ua rau: Buffers tuaj yeem tsim los ntawm ob lub ntsev uas muab cov kua qaub-paj sib txuas.}

Qhov kev sib xyaw ua ke yuav ua rau muaj kev daws teeb meem?

A tsis yog kev sib xyaw ntawm cov kua qaub tsis muaj zog lossis lub hauv paus thiab ntsev ntawm cov kua qaub uas tsis muaj zog lossis lub hauv paus. Buffers tuaj yeem tsim los ntawm peb qhov sib xyaw ua ke: (1) H ₃ PO ₄ thiab H _{2 PO} 4-^{, (2) H} 2_PO 4 − ^{and HPO} 42-^{, and (3) HPO} 42− ^{and PO} 43-. (Technically, ib qho tsis tuaj yeem tsim los ntawm ob qho tib si.)

Yuav ua li cas ob txoj kev daws teeb meem?

Cov tshuaj tsis haum yog tsim los ntawmcov kua qaub tsis muaj zog thiab nws lub hauv paus conjugate lossis lub hauv paus tsis muaj zog thiab nws cov kua qaub sib xyaw. Ob lub ntsiab tswj hwm pH sib npaug uas tiv thaiv kev hloov pauv thaum muaj zog acids lossis cov hauv paus ntxiv rau nws.