Video: Puas yog lead chromate lom?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev nyab xeeb phom sij
Vim muaj ob leeg coj thiab hexavalent chromium, lead chromate yog qhov tob tshuaj lom . Lead chromate raug kho nrog kev saib xyuas zoo hauv nws qhov chaw tsim khoom, qhov kev txhawj xeeb tseem ceeb yog plua plav.
Ib yam li ntawd, nws raug nug, tus qauv ntawm txhuas chromate yog dab tsi?
PbCrO4
Tsis tas li ntawd, tus nqi ntawm chromate yog dab tsi? Chromate yog ib qho ion uas muaj ib qho chromium atom (hauv nws lub xeev +6 oxidation) thiab plaub oxide atoms. Nws cov qauv yog CrO4. Nws tag nrho nqi yog -2. Dichromate zoo ib yam, tab sis nws muaj ob lub chromium atoms thiab xya oxide atoms (yog li ntawd, Cr2O7).
Tom qab ntawd, ib tus tuaj yeem nug, vim li cas cov hlau lead chromate tsis siv hauv tsev?
Cov hlau lead (II) chromate yog qee zaum siv nyob rau hauv artist paintings, tab sis tsis yog hauv tsev vim nws tuaj yeem ua rau tib neeg mob tom qab kis tau ntev. Txhua yam soluble chromate compound tuaj yeem ntxiv rau Pb( TSIS MUAJ ) ua form lead chromate thiab lub ntsiab lus dav dav siv rau cov khov kho cov khoom tsim yog precipitate.
Lub xeev oxidation ntawm Pb hauv pbcro4 yog dab tsi?
vim hais tias tus nqi ntawm monoatomic ion yog sib npaug oxidation naj npawb ntawm ion. oxidation naj npawb ntawm Pb = +2.
Pom zoo:
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