Bromothymol xiav yog hais txog cov tshuaj kuaj. Nws yog tsuas yog siv rau titration ntawm qaug zog acids thiab alkalis. Cov xim ntawm cov tshuaj hloov los ntawm daj mus rau khaus xiav. Muaj lwm yam siv rau nws.
Kev piav qhia
Bromothymol xiav yog qhov taw qhia ntawm acidity ntawm nruab nrab, uas tso cai rau koj sau cov kev hloov pauv hauv pH hauv thaj tsam ntawm 6-7, 6. Lwm lub npe rau cov tshuaj no yog bromthymol xiav, bromothymol sulfone phthalein, dibromothymol sulfophthalein. ammonium ntsev. Raws li qib ntawm cov tshuaj purity, nws yog tsim nrog ib tug tsim nyog - NDA (ntshiab rau kev tsom xam).
Tshuaj formula ntawm compound: C₂₇H₂₈Br₂O₅S.
Cov tshuaj muaj nyob rau hauv qeb ntawm triphenylmethane dyes, uas kuj suav nrog ci ntsuab, magenta thiab phenolphthalein.
Cov qauv qauv ntawm cov dej-soluble bromothymol xiav yog qhia hauv daim duab hauv qab no.
tshuaj muaj zog
Cov khoom tseem ceeb ntawm cov khoom sib xyaw, vim nws qhov kev siv tau raug txiav txim siab, yog qhov taw qhia. Nyob ntawm tej yam kev mob thiab cov concentrationsolutes bromthymol xiav hloov nws cov xim. Qhov taw qhia tsis cuam tshuam nrog cov khoom ntawm ib puag ncig thiab tsis cuam tshuam rau cov txheej txheem tshuaj lom neeg. Reagents ntawm hom no tso cai rau koj los txiav txim qhov tsis ua haujlwm ntawm qhov chaw ua haujlwm.
Cov khoom xyaw muaj cov yam ntxwv hauv qab no:
- alkaline ib puag ncig - xim xiav khaus;
- neutral ib puag ncig - nyom ntsuab;
- acid ib puag ncig - xim daj.
Xim hloov ntawm daj mus rau xiav tshwm sim los ntawm ntau qhov ntxoov ntsuab. Txhawm rau kom tau txais cov xim uas xav tau, siv 0.5% sodium hydroxide tov lossis 10% sodium carbonate tov (alkalinization), nrog rau 10% HCl tov (acidification).
Hauv cov tshuaj aqueous, bromthymol xiav ua raws li cov kua qaub tsis muaj zog. Cov kua qaub dissociation tas li rau cov tshuaj ntsuas no yog 7.1.
Lub cev muaj zog
Bromothymol xiav yog cov hmoov crystalline hauv cov tsos, cov xim uas tuaj yeem yog los ntawm daj-xim av mus rau dub (feem ntau pinkish-ntsuab). Cov hmoov muaj ntxhiab tsw ntxhiab ntawm acetic acid.
Cov yam ntxwv tseem ceeb ntawm lub cev ntawm cov khoom sib xyaw no yog:
- molar mass - 624.39 g / mol;
- tag nrho xeev - khoom;
- density - 1250 kg/m3;
- ntau feem ntawm cov seem tom qab calcination - tsis ntau tshaj 1%;
- melting point - 202 ° C;
- shareCov tshuaj nquag hauv cov hmoov - tsis tsawg dua 95% los ntawm qhov hnyav.
Lub solubility ntawm bromthymol xiav hauv dej yog nruab nrab, hauv ethyl cawv nws zoo (nrog rau kev tsim cov xim xim av), hauv acetone nws zoo.
Daim ntawv thov
Lub ntsiab ntawm daim ntawv thov ntawm qhov sib xyaw no yog kev txiav txim siab ntawm qhov concentration ntawm hydrogen ions los ntawm txoj kev colorimetric. Bromothymol xiav kuj tseem siv tau rau:
- qhia txog kev ua pa ua pa lossis photosynthesis (thaum cov pa roj carbon dioxide tawm, nws tig daj, thaum nws nqus tau, cov tshuaj hloov ntsuab);
- tswj kev tsim cov enzyme asparaginase, uas ua rau kev tawg ntawm aspartic amino acid (cov xim xiav ntawm cov tshuaj qhia txog kev nce hauv enzyme kev ua haujlwm);
- daim ntawv thov ua ib qho ntawm cov khoom nruab nrab hauv cov kab mob bacteriology los tswj kev txhim kho kab lis kev cai;
- kev pom ntawm cov phab ntsa ntawm tes lossis nuclei thaum kuaj xyuas hauv lub tshuab ntsuas;
- hauv gynecology - kuaj pom cov kab mob ntxov ntxov ntawm daim nyias nyias (amniotic kua muaj pH=7.2, yog li qhov ntsuas ntsuas tau dhau los ua xiav).
Nws cov khoom raws li qhov ntsuas tau siv dav hauv kev lag luam xws li:
- tshuaj;
- metallurgical;
- textile;
- food;
- kev ua liaj ua teb.
Kev daws teeb meem
Nyob rau hauv analytical chemistry, muaj 2 lub ntsiabYuav ua li cas ua kom bromthymol xiav:
- 0, 04% tov - 0.04 g ntawm qhuav teeb meem yog diluted nyob rau hauv 0.64 milliliters ntawm 0.1-N NaOH tov, ces diluted nrog 100 ml ntawm boiled dej txias;
- 1% tshuaj - ib qho reagent noj hauv qhov nyiaj ntawm 0.1 g yog diluted hauv 100 ml ntawm 20% ethanol.
Cov tshuaj cawv yog ib puag ncig ruaj khov thiab tuaj yeem khaws cia rau lub sijhawm ntev.
ntsuas kev nyab xeeb
Bromothymol xiav yog nplaim taws thiab tuaj yeem tsim cov plua plav tawg. Cov hluav taws tua hluav taws raug tua nrog dej txau, ua npuas dej, carbon dioxide, lossis cov hmoov tua hluav taws qhuav. Thaum hlawv, carbon monoxide thiab carbon dioxide, sulfur oxide thiab hydrogen bromide raug tso tawm.
Nws yuav ua rau muaj kev tsis haum tshuaj thiab staining mus tas li yog tias nws nkag mus rau ntawm daim tawv nqaij. Thaum sib cuag, yaug daim tawv nqaij nrog dej. Tsis txhob sib cuag nrog ob lub qhov muag thiab ua pa ib ntsuj av, vim qhov no yuav ua rau irritation ntawm mucous daim nyias nyias. Yog tias koj hnov mob, koj yuav tsum sab laj nrog kws kho mob. Thaum ua haujlwm nrog cov khoom siv, nws yog ib qho tsim nyog yuav tsum siv cov cuab yeej tiv thaiv tus kheej: tsom iav, zuag qhia tag nrho, hnab looj tes ua los ntawm nitrile roj hmab. Nws raug nquahu kom siv cov tshuaj tiv thaiv ib ntus thiab tshuaj pleev rau koj ob txhais tes.
Khaws cov tshuaj no rau hauv qhov chaw qhuav hauv cov thawv kaw. Chav yuav tsum muaj qhov cua hauv zos thiab dav dav.
