Vim li cas lub tog raj kheej kawm tiav yog qhov tseeb dua?
Vim li cas lub tog raj kheej kawm tiav yog qhov tseeb dua?

Video: Vim li cas lub tog raj kheej kawm tiav yog qhov tseeb dua?

Video: Vim li cas lub tog raj kheej kawm tiav yog qhov tseeb dua?
Video: txhob hnov qab kuv lub npe - Bee lee [Official MV] 2022-23 2024, Kaum ib hlis
Anonim

Kawm tiav cylinders yog tsim los rau raug Kev ntsuas cov kua dej nrog qhov yuam kev me me dua li beakers. Lawv nyias nyias dua ib lub beaker, muaj ntau ntau cov qhab nia kawm tiav, thiab tsim los ua kom tsis pub dhau 0.5-1% yuam kev. Yog li ntawd, qhov no meej dua cov txheeb ze ntawm lub beaker tsuas yog ib qho tseem ceeb rau yuav luag txhua qhov chaw kuaj.

Kuj paub, qhov twg yog qhov tseeb kawm tiav lub tog raj kheej lossis pipette?

Kawm tiav cylinders feem ntau yog ntau raug thiab meej dua li qhov chaw kuaj cov dej haus thiab cov beakers, tab sis lawv yuav tsum tsis txhob siv los ua qhov ntsuas volumetric; volumetric glassware, xws li lub khob ntim ntim lossis ntim ntim pib , yuav tsum tau siv, raws li nws yog txawm ntau raug thiab meej.

Kuj Paub, vim li cas koj thiaj siv lub tog raj kheej kawm tiav? Cov kawm tiav lub tog raj kheej yog siv rau ntsuas qhov ntim (ntau) ntawm cov kua. Cov khoom siv no yog siv niaj hnub, txawm tias nws yog tsuas yog nruab nrab qhov tseeb piv rau lwm yam cuab yeej, xws li ntim ntim. Volumetric khob siv thaum precision (qhov tseeb) yog xav tau.

Yog li ntawd, qhov tseeb npaum li cas yog ib lub tog raj kheej kawm tiav?

Qhov kev faib tsawg tshaj plaws ntawm qhov no kawm tiav lub tog raj kheej yog 1ml. Yog li ntawd, peb qhov kev nyeem ntawv yuam kev yuav yog 0.1 mL lossis 1/10 ntawm qhov tsawg tshaj plaws. Kev nyeem ntawv tsim nyog ntawm qhov ntim yog 36.5 0.1 mL. Ib qho sib npaug meej Tus nqi yuav yog 36.6 mL lossis 36.4 mL.

Dab tsi yog qhov precision ntawm 10 mL kawm tiav lub tog raj kheej?

Txoj cai dav dav ntawm tus ntiv tes xoo yog: koj tuaj yeem kwv yees ib tus lej ntxiv dhau qhov kev faib tsawg tshaj plaws ntawm qhov ntsuas ntaus ntawv. Yog koj saib a 10mL kawm tiav lub tog raj kheej , piv txwv li, qhov tsawg tshaj plaws kawm tiav yog kaum ntawm a milliliter (0.1 mL ). Qhov ntawd txhais tau tias thaum koj nyeem qhov ntim, koj tuaj yeem kwv yees mus rau qhov chaw pua pua (0.01 mL ).

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