Red vs Blue Litmus Ntawv
Cov ntsuas yog ib hom tshuaj tshwj xeeb, uas muaj peev xwm hloov lawv cov xim thaum pH hloov. Yog li, cov no yog hu ua pH ntsuas. Qee qhov ntsuas tuaj yeem coj cov xim sib txawv rau pH sib txawv. Piv txwv li, cov ntaub ntawv pH qhia ntau yam xim nyob ntawm lub zog ntawm acidity thiab lub hauv paus ntawm qhov nruab nrab. Cov ntsuas zoo li phenolphthalein tsuas yog hloov nws cov xim kom pom tias qhov nruab nrab yog acidic lossis yooj yim. Nws tsis muab ib lub tswv yim hais txog yuav ua li cas acidic los yog qhov nruab nrab yog qhov nruab nrab (tab sis qhov kev siv ntawm cov xim yuav txawv me ntsis hauv cov nruab nrab qis thiab siab). Piv txwv li, nyob rau hauv acidic nruab nrab phenolphthalein yog xim tsis muaj xim thiab hauv nruab nrab nruab nrab, nws yog xim liab. Lwm yam tshaj li cov tshuaj hluavtaws, muaj cov cim qhia ntuj. Piv txwv li, liab cabbage tuaj yeem noj. Cov ntsuas tuaj yeem ua ntau yam xws li hmoov, kua, ntawv kab txaij, thiab lwm yam. Nyob ntawm qhov yuav tsum tau ua, cov no tuaj yeem xaiv tau. Piv txwv li, txhawm rau qhia qhov kawg ntawm cov kua qaub titration, qhov taw qhia hauv daim ntawv tshuaj yog qhov zoo tagnrho. Txhawm rau txiav txim siab pH ntawm cov tshuaj tiv thaiv sib tov, peb tuaj yeem siv cov ntawv pH lossis cov ntawv litmus. Tsis tas li ntawd, cov ntsuas muaj pH sib txawv uas lawv tuaj yeem ua haujlwm raws li qhov ntsuas. Phenolphthalein muaj pH ntau ntawm 8.3-10, yog li nws hloov nws cov xim hauv pHs yooj yim. Raws li koj tuaj yeem paub, pH ntsuas yog qhov tseem ceeb rau lub chaw kuaj tshuaj. Lawv yooj yim los lis thiab siv, muab cov ntawv nyeem sai sai thiab feem ntau ntawm cov sij hawm nyeem ntawv yog qhov tseeb.
daim ntawv Litmus yog qhov taw qhia, uas tuaj yeem siv los txiav txim siab acidic thiab cov kev daws teeb meem yooj yim. Feem ntau qhov no tuaj raws li daim ntawv kab txaij. Kev sib xyaw ntawm cov dej-soluble dyes muab rho tawm los ntawm lichens zoo li Roccella tinctoria yog absorbed rau hauv cov ntawv lim, ua litmus ntawv. Hauv qhov sib tov no, muaj txog 10-15 hom dyes. Muaj ob hom ntawv litmus xws li xiav thiab liab.
Red Litmus Paper
Liab litmus ntawv yog siv los ntsuas cov kev daws teeb meem. Cov ntawv liab litmus tig xiav thaum ntsib nrog kev daws teeb meem. Cov ntaub ntawv nruab nrab litmus yog xim liab. Kev hloov xim ntawm cov ntaub ntawv litmus yog qhov chaw tshaj pH ntau ntawm 4.5-8.3 ntawm 25 ° C. Yog li ntawd, ib qho tsis zoo ntawm cov ntawv litmus yog tias lawv tsis tuaj yeem siv los txiav txim siab tus nqi pH. Lub zog ntawm acidity lossis lub hauv paus tseem tsis tuaj yeem txiav txim siab siv cov ntaub ntawv litmus. Ntawm qhov tod tes, cov ntawv nyeem yog instantaneous, thiab yooj yim mus nqa. Cov ntaub ntawv litmus tuaj yeem siv los ntawm leej twg yam tsis muaj kev txawj ntse. Lawv tsuas yog yuav tsum paub cov xim twg muaj feem cuam tshuam rau acidic thiab pH tus nqi.
Blue Litmus Paper
Blue litmus ntawv teb rau cov tshuaj acidic xws li cov ntawv liab litmus hloov nws cov xim rau xiav hauv nruab nrab / alkali nruab nrab. Thaum ib tug poob ntawm cov kua qaub yog muab tso rau hauv xiav xim litmus daim kab xev, nws tig mus rau liab.
Dab tsi yog qhov txawv ntawm Daim Ntawv Liab Litmus thiab Daim Ntawv Xiav Litmus?
• Raws li lub npe piav qhia, cov ntawv liab litmus yog xim liab, thiab cov ntawv xiav litmus yog xiav xim.
• Qhov txawv ntawm lawv yog lawv cov tshuaj tiv thaiv rau cov pH sib txawv.
• Cov ntawv liab litmus teb rau cov kev daws teeb meem, thaum cov ntawv xiav litmus teb rau cov kua qaub.
• Liab litmus hloov nws cov xim rau xiav nyob rau hauv nruab nrab nruab nrab, whereas xiav litmus hloov nws cov xim rau liab nyob rau hauv acidic nruab nrab.
