Video: Vim li cas cov xim ploj nyob rau hauv titration?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov kua txiv qaub yog lub hauv paus, yog li thaum phenolphthalein tau ntxiv rau hauv kev daws, nws tig cov tshuaj liab. Yog li ntawd nrog phenolphthalein, cov xim ploj nyob rau tam sim no acidic tov. Raws li koj ua rau koj lub tshuab ua pa mus rau hauv kev daws teeb meem, tam sim no muaj ntau dhau ntawm hydrogen ions lossis kua qaub.
Ib sab ntawm qhov no, vim li cas cov xim liab ploj mus hauv qhov sib piv?
Vim li cas liab xim, uas tsim nyob rau ntawm qhov chaw uas sodium hydroxide los rau hauv kev sib cuag nrog cov tshuaj hauv lub hwj, ploj qeeb dua nyob ze qhov kawg? Cov paj yeeb xim ploj qeeb qeeb nyob ze qhov kawg vim tias tus neeg tsis txaus siab thiab cov piv txwv yuav luag tag.
Tsis tas li ntawd, vim li cas cov xim hloov pauv hauv qhov titration? Qhov ntsuas pH yog ib yam khoom uas nws hloov nws xim hauv kev teb rau tshuaj hloov . Qhov taw qhia acid-base hloov nws xim nyob ntawm qhov pH (piv txwv li, phenolphthalein). Ib qho poob ntawm qhov ntsuas kev daws teeb meem tau ntxiv rau titration thaum pib; ntawm qhov kawg tau mus txog qhov hloov xim.
Xav txog qhov no, vim li cas cov ntsiab lus ntawm qhov kawg ntawm cov xim ploj?
Phenolphthalein yog ib qho ntawm feem ntau cov kua qaub-puag ntsuas siv los txiav txim siab qhov kawg taw tes hauv acid-base cov ntsiab lus . Yog tias muaj cov hauv paus ntau dhau ntawm qhov kawg ntawm cov kua qaub-puag titration , xim liab phenolphthalein xim ploj yog tias cov tshuaj raug tso cai sawv ntsug ib pliag.
Vim li cas KMnO4 yog Coloured thiab qhov sib txawv peb pom tom qab titration thiab yog vim li cas?
Thaum twg koj ua ib redox titration nrog poov tshuaj permanganate, cov titrant (KMnO) hauv burette yog sib sib zog nqus ntshav hauv xim . Qhov no yog vim tias qhov concentration yog qhov loj heev. Qhov siab ntawm Mn ntxiv no yog qhov me me, yog li nws ua rau lub ntsej muag paj yeeb tsis txhob siv cov xim liab muaj zog.
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Cov iav qhov muag sib txawv sib txawv heev, nyob ntawm tus qauv thiab hom iav. Cov looj ntsej muag uas siv tau txhua hnub raug nqi ntawm $ 45 thiab txog $ 90 toj ib hlis. Cov looj tsom iav txuas ntxiv, uas tuaj yeem hnav tau los ntawm ib lub lis piam mus rau peb lub hlis, raug nqi nruab nrab ntawm $ 12 txog $ 90 rau kev them nyiaj txhua hli