Video: Qhov kev daws teeb meem twg yog qhov tsis?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A tsis daws yog ib qho uas tiv thaiv kev hloov pauv hauv pH thaum me me ntawm cov kua qaub lossis alkali ntxiv rau nws. Acid tsis pub kev daws teeb meem. Ib qho acidic tsis daws tsuas yog ib qho uas muaj pH tsawg dua 7. Acidic tsis pub Cov kev daws teeb meem feem ntau yog tsim los ntawm cov kua qaub tsis muaj zog thiab ib qho ntawm nws cov ntsev - feem ntau yog sodium ntsev.
Ib yam li ntawd, koj yuav txiav txim siab li cas yog tias qhov kev daws teeb meem yog qhov tsis?
A tsis pub yog qhov sib xyaw ntawm lub hauv paus tsis muaj zog thiab nws cov conjugate acid sib xyaw ua ke hauv qhov muaj txiaj ntsig zoo. Lawv ua rau cov kev hloov pauv tag nrho hauv pH. Yog li kwv yees. sib npaug ntawm qhov tsis muaj zog hauv paus nrog nws cov conjugate acid, los yog ntxiv ntawm ib nrab ntawm cov kua qaub uas muaj zog rau lub hauv paus tsis muaj zog, tsis pub.
Ib tug kuj yuav nug, uas sib tov yuav tsim ib tug tsis? Buffers Ua li no los ntawm kev tsim los ntawm qee cov kua qaub: ib qho tsis muaj zog acid ntxiv rau ntsev tau los ntawm cov kua qaub uas tsis muaj zog los yog lub hauv paus tsis muaj zog ntxiv rau ntsev ntawm lub hauv paus tsis muaj zog. Piv txwv li, a tsis tuaj yeem yog tsim los ntawm yaj acetic acid (HC 2H 3O 2, tsis muaj zog acid) thiab sodium acetate (NaC 2H 3O 2, ntsev tau los ntawm cov kua qaub).
Nyob rau hauv no txoj kev, uas aqueous tov yog ib tug tsis?
Cov tshuaj tsis haum (ntau dua, pH tsis yog hydrogen ion buffer) yog cov tshuaj aqueous uas muaj kev sib xyaw ntawm cov kua qaub uas tsis muaj zog thiab nws lub hauv paus conjugate, los yog vice versa. Nws pH hloov me ntsis thaum me me ntawm cov kua qaub uas muaj zog lossis cov hauv paus ntxiv rau nws.
Puas yog dej tsis haum?
Dej yog a tsis pub txawm tus pluag. Qhov no yog vim H20 pom ionises los ua H30+ thiab OH-. Tsim kom muaj acidic buffer tsis koj xav tau ib tug qaug zog acid nrog lub conjugate puag. Raws li yuav muaj hydronium thiab hydroxide ions tam sim no yog nws ua raws li ib tug tsis pub tab sis yog ib qho txaus ntshai.
Pom zoo:
Yuav ua li cas koj thiaj paub yog tias tus nqi sib npaug tsis muaj kev daws teeb meem?
Tus nqi tiag tiag ntawm tus lej yog nws qhov kev ncua deb ntawm xoom. Tus lej ntawd yuav yog qhov zoo, vim koj tsis tuaj yeem ua tsis zoo ob txhais taw deb ntawm ib yam dab tsi. Yog li txhua tus nqi sib npaug sib npaug sib npaug rau tus lej tsis zoo yog tsis muaj kev daws teeb meem, txawm tias tus lej ntawd yog dab tsi
Koj yuav txiav txim siab li cas yog tias qhov tsis sib xws tsis muaj kev daws teeb meem?
Cais tawm tus nqi tseeb ntawm sab laug ntawm qhov tsis sib xws. Yog tias tus lej ntawm sab nraud ntawm qhov tsis sib xws yog qhov tsis zoo, koj qhov kev sib npaug tsis muaj kev daws teeb meem lossis tag nrho cov lej tiag tiag li kev daws teeb meem. Siv cov cim ntawm txhua sab ntawm koj qhov tsis sib xws los txiav txim siab qhov twg ntawm cov xwm txheej no tuav
Qhov twg yog acidic ntau dua ib qho kev daws ntawm pH 2 lossis kev daws ntawm pH 6?
Kev piav qhia: pH yog qhov ntsuas ntawm acidity lossis alkalinity ntawm cov tshuaj. concentration siab dua yog acidity. Yog li ib qho kev daws ntawm pH = 2 yog acidic ntau dua li ntawm pH = 6 los ntawm qhov zoo ntawm 10000
Puas yog nws ua tau rau ib qho kev sib npaug ntawm ob txoj kab sib npaug kom tsis muaj kev daws teeb meem piav qhia koj qhov laj thawj?
Cov kab ke ntawm kab sib npaug tuaj yeem tsuas muaj 0, 1, lossis ib qho kev daws teeb meem tsis kawg. Ob kab no tsis tuaj yeem hla ob zaug. Cov lus teb raug yog tias qhov system muaj ib qho kev daws teeb meem. Total Number of Points Number of 2-Point Baskets Number of 3-Point Baskets 17 4 (8 ntsiab lus) 3 (9 points) 17 1 (2 points) 5 (15 points)
Yuav ua li cas koj thiaj paub yog tias tus nqi tsis sib xws tsis muaj kev daws teeb meem?
Okay, yog tias qhov tseem ceeb tshaj plaws yeej ib txwm zoo lossis xoom tsis muaj txoj hauv kev uas lawv tuaj yeem tsawg dua lossis sib npaug rau tus lej tsis zoo. Yog li ntawd, tsis muaj kev daws teeb meem rau ob qho no. Hauv qhov no yog tias tus nqi tiag tiag yog qhov zoo lossis xoom ces nws yuav nco ntsoov ntau dua lossis sib npaug rau tus lej tsis zoo