Burettes

Kodi Burette ndi chiyani?

Freette, yomwe imadziwikanso kuti buret nthawi zina, ndi chida chofunikira cha labotale pankhani ya chemistry ndi sayansi ina. Amagwiritsidwa ntchito kwambiri pogawira timadzi tating'ono tating'ono, tomwe timadziwika kuti aliquots, ndipo nthawi zina mpweya. Mapangidwe a burette amakhala ndi chubu lagalasi lalitali, lomaliza maphunziro ndi valavu kapena stopcock pamapeto amodzi, zomwe zimalola kuti madzi aziyenda bwino. Chida cholondolachi ndichofunikira pakuwunika kuchuluka kwa mankhwala, pomwe kuyeza kolondola ndikofunikira.

Burette mu Chemistry: Tanthauzo ndi Kugwiritsa Ntchito

Mu gawo la chemistry, ntchito ya burette ndiyofunikira. Amagwiritsidwa ntchito pazinthu zomwe zimafuna kulondola kwambiri pakuyeza kuchuluka kwa voliyumu, monga titration, njira yomwe imagwiritsidwa ntchito kudziwa kuchuluka kwa chinthu mu yankho. Tanthauzo la burette limaphatikiza kapangidwe kake ndi ntchito yake: chubu lagalasi lomaliza lomwe lili ndi stopcock yowongolera kutuluka kwamadzi. Kulondola komanso kulondola kwa freette kumapangitsa kuti ikhale chisankho chokondedwa kuposa zida zina zoyezera pazowunikira zambiri zamankhwala.

Mitundu ya Burettes

Volumetric Burette

Volumetric burette ndi mtundu wamba m'ma laboratories. Amapangidwa makamaka kuti apereke milingo yamadzimadzi. Omaliza maphunziro pa burette amalola kuwerengera molondola kuchuluka kwamadzimadzi, zomwe ndizofunikira kwambiri pakuyesa komwe kuchuluka kwake kuli kofunikira.

Piston Burette

Piston burette imagwira ntchito mofananamo ndi syringe, yokhala ndi chiboliboli cholondola komanso chopondera chowongolera kuyenda kwamadzi. Mtundu uwu ukhoza kugwiritsidwa ntchito pamanja kapena pamoto, kupereka mwatsatanetsatane komanso kugwiritsa ntchito mosavuta. Maburette a piston amadziwika ndi kulondola kwawo, kuwapanga kukhala oyenera kuyeza kolondola kwambiri.

Momwe Mungawerengere Volume ya Buret

Kuwerenga voliyumu kuchokera ku burette, kaya ndi volumetric burette kapena mtundu wa pistoni, kumafuna chidwi chatsatanetsatane. Meniscus yamadzimadzi, yomwe imapangidwa ndi madzi mu chubu, iyenera kuwerengedwa pamlingo wamaso. Kuti muyezedwe molondola, ndikofunikira kuzindikira pansi pa meniscus. Njirayi imatsimikizira kulondola pakuwunika kwa volumetric komanso mukamagwiritsa ntchito burette pazinthu zina.

Magawo a Burette ndi Ntchito Zawo

Kumvetsetsa mbali za burette ndikofunikira kuti zigwiritsidwe ntchito moyenera. Zigawo zikuluzikulu zikuphatikizapo:

• Maphunziro a Tube: Ichi ndi gawo lapakati la burette, lolembedwa ndi maphunziro a voliyumu kuti muyese molondola.
• Stopcock/Vavu: Ili pansi, imayang'anira kutuluka kwa madzi kuchokera ku burette.
• Kudzaza Tube: Maburette ena ali ndi chubu chosiyana chodzaza burette ndi madzi kuti ayezedwe.

Gawo lirilonse limagwira ntchito yofunikira pakugwira ntchito ndi kulondola kwa burette.

Kugwiritsa ntchito Burette mu Zosintha za Laboratory

Burettes amagwiritsidwa ntchito makamaka pakuwunika kwachulukidwe kwamankhwala. Kulondola kwawo kumawapangitsa kukhala abwino kwa:

• Titration: Kudziwa kuchuluka kwa chinthu mumsanganizo.
• Kuyeza kwa Voliyumu: Kuyeza molondola ndi kusamutsa milingo yaying'ono yamadzimadzi.
• Kulimbitsa: Poyesa zida zina za volumetric chifukwa cha kulondola kwambiri.

Pomaliza, burette, yokhala ndi mitundu yosiyanasiyana komanso kuthekera koyezera bwino, ndi chida chofunikira kwambiri pazamankhwala ndi maphunziro ena asayansi. Mapangidwe ake, opangidwa ndi chubu lagalasi lomaliza maphunziro ndi stopcock, limalola miyeso yolondola komanso yobwerezabwereza, yomwe ndi yofunikira pamachitidwe ambiri a labotale.