Video: Yuav ua li cas tshwm sim thaum koj sib tov lead nitrate thiab sodium iodide?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Yog hais tias ob ntawm cov ions nyob rau hauv lub resulting sib tov ua ke tsim ib qho insoluble compound los yog precipitate, ib qho tshuaj tiv thaiv tshwm sim . Thaum ib tug ntshiab colorless tov ntawm hlau nitrate (Pb(NO3)2) yog ntxiv rau cov xim ntshiab ntshiab ntawm sodium iodide (NaI), daj nag lossis daus ntawm lead iodide (PIB2) tshwm.
Ib yam li ntawd, nws tau nug, hom tshuaj tiv thaiv dab tsi yog lead nitrate thiab sodium iodide?
Coj II nitrate thiab sodium iodide teb ua form sodium nitrate thiab coj II iodide . Qhov sib npaug tshuaj sib npaug yog Pb(NO3)2 + 2NaI ---> 2NaNO3 + PbI2. Muaj pes tsawg mais sodium iodide teb nrog 250.
Qhov thib ob, ua li cas thaum koj sib xyaw cov hmoov lead nitrate thiab sodium chloride? Lus Teb Ntev: Yog tias ob qho tib si khov, tsis muaj dab tsi yuav tshwm sim ; lawv yuav yooj yim sib tov ua ke thiab tsis hnov mob. Nyob rau hauv lawv lub xeev, tsis muaj reactive ions; tus coj (II) thiab nitrate tsim ionic bonds nrog ib leeg. Yog li ntawd, lub sodium thiab nitrate yuav nyob twj ywm hauv kev daws nrog cov dej molecules.
Tom qab ntawd, dab tsi ua rau precipitate tsim thaum txhuas nitrate thiab sodium iodide tov?
Cov tshuaj uas ua rau cov khoom rau daim ntawv hu ua 'precipitant'. Tsis muaj lub zog txaus ntawm lub ntiajteb txawj nqus (tso tawm) kom coj cov khoom sib xyaw ua ke, lub nag xob nag cua tseem nyob hauv kev ncua. Thaum poov tshuaj iodide daws reacts nrog coj (II) tshuaj nitrate , ib yellow nag xob nag cua ntawm coj (II) iodide yog tsim.
Yuav ua li cas thaum peb sib tov lead nitrate thiab potassium iodide?
Cov hlau nitrate cov tshuaj muaj particle (ions) ntawm coj , thiab cov poov tshuaj iodide kua muaj particles ntawm iodide . Thaum cov kev daws teeb meem sib tov , cov coj particle thiab iodide cov khoom sib xyaw ua ke thiab tsim ob lub tebchaw tshiab, cov khoom daj hu ua lead iodide thiab cov khoom dawb hu ua poov tshuaj nitrate.
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