Burettes

Burette yog dab tsi?

Lub burette, tseem hu ua buret hauv qee qhov ntsiab lus, yog ib qho tseem ceeb ntawm cov khoom siv hauv chav kuaj hauv thaj tsam ntawm chemistry thiab lwm yam kev tshawb fawb. Nws yog feem ntau yog siv rau dispensing me me, meej ntim ntawm cov kua, hu ua aliquots, thiab qee zaus gases. Lub burette tus tsim nta ntev, kawm tiav iav raj nrog lub valve lossis stopcock ntawm ib kawg, uas tso cai rau kev tswj cov kua dej. Qhov ntsuas ntsuas no yog qhov tseem ceeb rau kev ntsuas tshuaj ntau npaum li cas, qhov ntsuas qhov tseeb yog qhov tseem ceeb.

Burette hauv Chemistry: Txhais thiab Siv

Nyob rau hauv lub realm ntawm chemistry, ib tug burette lub luag hauj lwm yog indispensable. Nws yog siv rau cov dej num uas yuav tsum tau muaj siab precision nyob rau hauv lub ntim ntsuas, xws li titration, ib txoj kev siv los txiav txim siab concentration ntawm ib cov tshuaj nyob rau hauv ib tug tov. Lub ntsiab lus burette suav nrog nws cov qauv tsim thiab kev ua haujlwm: lub khob iav tiav nrog lub stopcock rau kev tswj cov kua dej. Qhov tseeb thiab qhov tseeb ntawm ib lub burette ua rau nws yog qhov kev xaiv zoo dua li lwm cov khoom siv ntsuas hauv ntau cov tshuaj ntsuam xyuas.

Hom ntawm Burettes

Volumetric Burette

Lub volumetric burette yog ib hom nyob rau hauv lub chaw soj nstuam. Nws yog tsim tshwj xeeb los xa cov ntsuas ntim ntawm cov kua. Cov kev kawm tiav raws li burette tso cai rau kev nyeem cov kua ntim, uas yog qhov tseem ceeb hauv kev sim uas yuav tsum muaj pes tsawg.

Piston Burette

Lub piston burette ua haujlwm zoo ib yam li lub koob txhaj tshuaj, uas muaj qhov ntsuas qhov tseeb thiab lub plunger rau kev tswj cov kua txav. Hom no tuaj yeem ua manually los yog motorized, muab kev txhim kho precision thiab yooj yim ntawm kev siv. Piston burettes paub txog lawv cov burette precision, ua rau lawv haum rau kev ntsuas qhov tseeb.

Yuav Ua Li Cas Nyeem Buret Volume

Kev nyeem cov ntim los ntawm ib lub burette, txawm tias nws yog volumetric burette lossis hom piston, yuav tsum tau saib xyuas kom meej. Cov kua meniscus, qhov nkhaus tsim los ntawm cov kua hauv lub raj, yuav tsum tau nyeem ntawm qhov muag. Txhawm rau ntsuas qhov tseeb, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov hauv qab ntawm lub meniscus. Cov txheej txheem no ua kom muaj tseeb hauv ob qho tib si ntsuas ntsuas thiab thaum siv cov burette rau lwm lub hom phiaj.

Ib feem ntawm Burette thiab lawv cov haujlwm

Nkag siab txog qhov chaw ntawm lub burette yog qhov tseem ceeb rau nws txoj kev siv kom raug. Cov khoom tseem ceeb muaj xws li:

• Tube kawm tiav: Qhov no yog qhov chaw nruab nrab ntawm lub burette, cim nrog cov ntim tiav rau kev ntsuas kom raug.
• Stopcock / Valve: Nyob rau hauv qab, nws tswj cov dej ntws ntawm cov burette.
• Filling Tube: Qee cov burettes muaj ib lub raj cais rau sau cov burette nrog cov kua ntsuas.

Txhua feem ua lub luag haujlwm tseem ceeb hauv kev ua haujlwm thiab qhov tseeb ntawm burette.

Kev siv cov Burette hauv Chaw Ua Haujlwm

Burettes feem ntau yog siv rau hauv kev tshuaj ntsuam quantitative chemical. Lawv precision ua rau lawv zoo tagnrho rau:

• Titration: Txhawm rau txiav txim siab qhov concentration ntawm cov tshuaj hauv cov tshuaj.
• Kev Ntsuas Suab: Rau qhov raug ntsuas thiab hloov cov kua ntim me me.
• calibration: Hauv calibrating lwm yam khoom siv volumetric vim lawv siab precision.

Nyob rau hauv xaus, lub burette, nrog rau nws ntau hom thiab meej ntsuas muaj peev xwm, yog ib tug indispensable cuab tam nyob rau hauv lub teb ntawm chemistry thiab lwm yam scientific kev qhuab qhia. Nws cov qauv tsim, suav nrog lub khob iav tiav nrog lub stopcock, tso cai rau kev ntsuas kom raug thiab rov ua dua, uas yog qhov tseem ceeb hauv ntau cov txheej txheem kuaj.