Qhov sib txawv tseem ceeb ntawm bromocresol xiav thiab bromocresol ntshav yog qhov hloov xim rau bromocresol xiav yog daj (acidic xim) rau ntsuab (tsis nruab nrab) rau xiav (xim xim) thaum xim hloov rau bromocresol ntshav yog daj (acidic. colour) mus violet (xim xim).
Muaj ntau lub tebchaw uas peb siv los tshuaj xyuas cov acidity lossis theem pib ntawm kev daws. Qhov tseeb, txhua qhov kev daws teeb meem muaj tus nqi pH ntawm 0 txog 14; peb hu nws lawv tus nqi pH. Feem ntau, peb xav txog cov kev daws teeb meem nrog pH qhov tsawg dua 7 raws li acidic thaum cov uas muaj pH tus nqi ntau dua 7 yog cov kev daws teeb meem. Txawm li cas los xij, kev daws teeb meem nrog pH tus nqi 7 yog cov tshuaj nruab nrab. Ntxiv mus, cov tebchaw uas peb siv los xyuas cov pH qhov tseem ceeb ntawm kev daws yog cov ntsuas pH. Bromocresol Blue thiab Bromocresol Purple yog ob qhov pH zoo heev uas muaj txiaj ntsig zoo hauv biology thiab tshuaj chemistry. Txawm hais tias lawv ua haujlwm zoo ib yam, muaj qee qhov sib txawv ntawm Bromocresol Blue thiab Bromocresol Purple, uas peb yuav tham hauv kab lus no.
Bromocresol Blue yog dab tsi?
Bromocresol Blue yog cov hmoov ntsuab violet uas tsis muaj ntxhiab tsw. Nws yog cov khoom tsis-flammable. Thiab, yog hais tias ib tug neeg noj nws, nws yuav tsum tau muab 1-2 khob mis nyuj rau induce ntuav. Tsis tas li ntawd, thaum peb ua kom sov nws kom decompose, nws muab cov pa tawm acrid. Nws tsis muaj kev phom sij, tab sis peb yuav tsum siv ceev faj.
Yog li, yog Bromocresol xiav nkag mus rau hauv lub qhov muag, tus neeg yuav tsum ntxuav qhov muag hauv dej rau qee lub sijhawm kom ntxuav nws. Nws yog ib qho qhia tias peb siv hauv acid-base titrations qhov twg lub hauv paus tsis muaj zog yog titrated tiv thaiv cov acid tsis muaj zog. Qhov taw qhia yog daj ntawm pH tsawg dua 6 thiab xiav ntawm pH ntau dua 7.6. Nws hloov ntsuab ntawm pH 7 uas yog qhov nruab nrab pH ntawm cov kua qaub tsis muaj zog / cov kua qaub.
Bromocresol Purple yog dab tsi?
Nws yog qhov ntsuas pH thiab tseem ceeb xws li zas xim thiab. Hauv cov ntsiab lus, cov xim acidic ntawm qhov ntsuas no yog daj thiab cov xim yooj yim yog violet. Hauv lwm lo lus, qhov ntsuas no hloov daj ntawm pH qhov tseem ceeb hauv qab 5.2 thiab hloov violet ntawm pH qhov tseem ceeb tshaj 6.8. Feem ntau, peb npaj nws li 0.04% aqueous tov. Feem ntau, peb siv nws hauv cov chaw kuaj mob. Qhov ntawd yog ntsuas cov ntsiab lus albumin hauv cov qauv. Muaj qee qhov lwm yam kev siv thiab; Peb tuaj yeem siv nws hauv chav kuaj microbiological kom stain cov hlwb tuag thiab kuaj cov kab mob lactic acid. Qhov taw qhia no muaj raws li cov xim liab doog hmoov.
Daim duab 01: Cov qauv tshuaj ntawm Bromocresol Ntshav
Cov tshuaj no yog sodium ntsev. Yog tias nws nkag mus rau hauv qhov muag yuam kev, ib tus yuav tsum ntxuav qhov muag nrog dej ntau dhau rau 15 feeb nqa daim tawv muag sab sauv thiab sab qis dua. Yog hais tias ib tug neeg noj cov tshuaj, kev tswj tshuaj lom yuav tsum raug hu tam sim ntawd. Thaum nqus tau, huab cua ntshiab yuav ua pa rov zoo li qub. Nws yog cov khoom tsis-flammable uas emits acrid fumes thaum rhuab mus decomposition. Bromocresol ntshav yuav tsum tau khaws cia nrog qhov cua kom zoo.
Qhov txawv ntawm Bromocresol Blue thiab Bromocresol Purple yog dab tsi?
Bromocresol xiav yog cov hmoov violet ntsuab uas tsis muaj ntxhiab tsw thaum bromocresol ntshav yog qhov ntsuas pH thiab tseem ceeb ntawm cov xim zoo ib yam. Bromocresol ntshav tshwm raws li cov xim liab doog hmoov. Cov xim hloov rau bromocresol xiav yog daj (acidic colour) mus rau ntsuab (nruab nrab) mus rau xiav (xim xim) thaum cov xim hloov rau bromocresol ntshav yog daj (acidic xim) rau violet (xim xim). Qhov no yog qhov sib txawv tseem ceeb ntawm bromocresol xiav thiab bromocresol ntshav. Tsis tas li ntawd, lwm qhov sib txawv ntawm bromocresol xiav thiab bromocresol ntshav yog tias bromocresol xiav muab cov xim hloov ntawm pH ntau ntawm 6 txog 7.6 thaum cov xim hloov ntawm bromocresol ntshav tshwm sim ntawm 5.2 txog 6.8 pH ntau yam.
Ntau qhov tseeb txog qhov sib txawv ntawm bromocresol xiav thiab bromocresol ntshav yog muab rau hauv qab infographic.
Summary – Bromocresol Blue vs Bromocresol Ntshav
Bromocresol xiav thiab bromocresol ntshav yog qhov tseem ceeb pH ntsuas. Qhov sib txawv tseem ceeb ntawm bromocresol xiav thiab bromocresol ntshav yog qhov hloov xim rau bromocresol xiav yog daj (acidic colour) mus rau ntsuab (nruab nrab) rau xiav (xim xim) thaum xim hloov rau bromocresol ntshav yog daj (acidic xim) rau violet (xim yooj yim).
