Video: Litmus paper acid ua dab tsi?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Lub ntsiab siv ntawm litmus yog rau xeem seb puas yog kev daws teeb meem yog acidic los yog yooj yim. Xiav ntawv litmus hloov liab nyob rau hauv acidic tej yam kev mob thiab liab litmus ntawv hloov xiav nyob rau theem pib lossis alkaline, nrog cov xim hloov pauv tshwm sim pH 4.5-8.3 ntawm 25 ° C (77 ° F). Nruab nrab litmus paper yog ntshav liab.
Ib sab ntawm qhov no, kev siv ntsuas litmus yog dab tsi?
Litmus daim ntawv yog ib qho cuab yeej siv los ntsuas seb cov khoom puas yog cov kua qaub lossis lub hauv paus. Thaum ib yam khoom tau yaj hauv dej, qhov kev daws teeb meem ua rau cov ntawv litmus hloov xim. Lub acidity los yog alkalinity ntawm kev daws teeb meem yog txiav txim siab los ntawm kev sib xyaw ntawm hydrogen ions, lossis lub zog ntawm hydrogen, qhia ua tus nqi pH.
Kuj Paub, yuav ua li cas cov kua qaub thiab cov hauv paus cuam tshuam rau xim ntawm litmus ntawv? Litmus Test Chemistry Nws yog vim 7-hydroxyphenoxazone. Thaum raug kua qaub hauv qab pH 4.5, lub molecule zoo li cov duab hauv qab no thiab qhov no muab ntawv litmus nws red xim . Lub xub ntiag ntawm kua qaub ua litmus tig liab thaum lub xub ntiag ntawm puag (alkali) tig litmus xiav.
Ua qhov no hauv kev txiav txim siab, yuav muaj dab tsi tshwm sim thaum ntawv liab litmus tau dipped hauv cov kua qaub?
Siv Red Litmus Paper Liab daim ntawv litmus liab rau hauv kev daws teeb meem seb cov khoom puas yog acidic lossis alkaline. Hauv cov tshuaj acidic lossis nruab nrab, liab litmus ntawv seem liab . Thaum ib qho alkaline compound dissolves hauv dej, nws tsim hydroxide ions, uas ua rau cov tshuaj ua alkaline.
Daim ntawv litmus ua los ntawm dab tsi?
Cov khoom siv tseem ceeb siv rau ua litmus ntawv yog ntoo cellulose, lichens, thiab adjunct compounds. Litmus ntawv , raws li nws lub npe cuam tshuam, feem ntau yog tsim los ntawm ntawv . Cov ntawv siv ua ntawv litmus yuav tsum tsis muaj cov kab mob sib kis uas tuaj yeem hloov pH ntawm qhov system nws ntsuas.
Pom zoo:
Dab tsi yog cov tshuaj tiv thaiv ntawm daim ntawv xiav litmus thaum dipped rau hauv cov kua qaub uas muaj tshuaj?
Daim ntawv liab litmus reacts rau alkaline tshuaj los ntawm tig xiav, thaum xiav litmus ntawv reacts rau acidic tshuaj los ntawm tig liab
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