Video: Cov xim ntawm phenol liab ntawm nruab nrab pH yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Dab tsi yog xim ntawm phenol liab ntawm acid pH thiab ntawm alkaline pH? daj ntawm acid pH, ci liab ntawm alkaline pH. Phenol liab yog liab los yog txiv kab ntxwv nyob nruab nrab pH.
Ntawm no, dab tsi xim phenol liab tig rau hauv lub hauv paus?
Kev daws ntawm phenol liab yog siv los ua pH qhia, feem ntau hauv kab lis kev cai ntawm tes. Nws cov xim nthuav tawm ib qho kev hloov maj mam los ntawm daj (λmax = 443 nm) mus red (λmax = 570 nm) tshaj pH ntau 6.8 txog 8.2. Tshaj pH 8.2, phenol liab hloov a ci liab ( fuchsia ) xim. thiab yog txiv kab ntxwv-liab.
Qhov thib ob, cov xim twg yog cov xov xwm ntawm pH hauv paus? Ntawm physiological pH, media yog liab- liab xim. Thaum cov xov xwm yog acidic nws tig daj- txiv kab ntxwv xim raws li koj tau piav qhia, thiab thaum pib nws hloov xim liab (xws li yog tias koj ntxiv tshuaj dawb).
Yog li ntawd, dab tsi xim phenol liab tig nyob rau hauv acidic tej yam kev mob?
Phenol liab yog dej-soluble dye siv raws li pH qhia, hloov los ntawm daj kom liab dhau pH 6.6 txog 8.0, thiab tom qab ntawd tig a ci liab xim saum toj no pH 8.1.
Qhov pH ntau npaum li cas rau kev hloov xim ntawm phenolphthalein?
Phenolphthalein ua hauj lwm txawv me ntsis raws li nws yog ib txwm tsis muaj xim tab sis tig liab liab nyob rau hauv alkaline daws. Cov tebchaw tseem tsis muaj xim thoob plaws hauv lub ntau ntawm acidic qib pH tab sis pib tig liab ntawm ib qib pH ntawm 8.2 thiab txuas ntxiv mus rau lub ci ntshav hauv cov alkaline muaj zog dua.
Pom zoo:
Cov xim dab tsi Bromothymol xiav tig rau hauv cov tshuaj nruab nrab?
Cov kev siv tseem ceeb ntawm bromothymol xiav yog rau kev kuaj pH thiab kuaj cov photosynthesis thiab ua pa. Bromothymol xiav muaj xim xiav thaum nyob rau hauv tej yam kev mob (pH tshaj 7), xim ntsuab nyob rau hauv nruab nrab tej yam kev mob (pH ntawm 7), thiab daj xim nyob rau hauv acidic tej yam kev mob (pH nyob rau hauv 7)
Qhov nruab nrab nruab nrab ntawm lub ntiaj teb yog dab tsi?
Lub teb chaws qhov ntsuas kub yog 2.91 ° C (5.24 ° F) saum toj no 1961-1990 qhov nruab nrab, tawg cov ntaub ntawv yav dhau los tau teev tseg hauv 2013 los ntawm 0.99 ° C (1.78 ° F)
Cov xim dab tsi yog cov hlwb feem ntau ua ntej siv thawj cov xim rau cov txheej txheem Gram stain?
Ua ntej, siv lead ua violet, thawj stain, yog siv rau lub tshav kub-tso smear, muab tag nrho cov hlwb xim liab
Dab tsi xim yog phenol liab hauv cov kua qaub?
Phenol liab yog qhov ntsuas ph uas yuav yog txiv kab ntxwv ntawm. Phenol liab yog pH qhia tias yuav yog txiv kab ntxwv ntawm nruab nrab pH; daj nyob rau hauv acidic ib puag ncig thiab tsaus liab nyob rau hauv ib puag ncig yooj yim
Koj ua li cas sib npaug redox cov tshuaj tiv thaiv hauv acidic thiab nruab nrab nruab nrab?
Acid Conditions Solution. Kauj Ruam 1: Sib cais ib nrab cov lus teb. Kauj Ruam 2: Ntsuas cov ntsiab lus uas tsis yog O thiab H. Kauj Ruam 3: Ntxiv H2O kom sib npaug ntawm cov pa. Kauj Ruam 4: Sib npaug hydrogen los ntawm kev ntxiv protons (H +). Kauj Ruam 5: Ntsuas tus nqi ntawm txhua qhov sib npaug nrog electrons. Kauj Ruam 6: Ntsuas cov tshuaj tiv thaiv kom cov electrons sib npaug