Cov polarity cuam tshuam li cas dej lub luag haujlwm ua cov kuab tshuaj?
Cov polarity cuam tshuam li cas dej lub luag haujlwm ua cov kuab tshuaj?

Video: Cov polarity cuam tshuam li cas dej lub luag haujlwm ua cov kuab tshuaj?

Video: Cov polarity cuam tshuam li cas dej lub luag haujlwm ua cov kuab tshuaj?
Video: CS50 2013 - Week 7 2024, Kaum ib hlis
Anonim

Dej Solvent Cov khoom. Dej , uas tsis tsuas yog dissolves ntau lub tebchaw tab sis kuj dissolves ntau tshaj li lwm yam kua, yog suav tias yog universal kuab tshuaj . A polar molecule nrog ib nrab-zoo thiab tsis zoo nqi, nws yooj yim dissolves ions thiab polar molecules.

Ib yam li ntawd, koj tuaj yeem nug, qhov polarity cuam tshuam li cas dej lub luag haujlwm ua kuab tshuaj?

Ua li cas dej polarity cuam tshuam nws cov khoom zoo li a kuab tshuaj . Dej polarity muab nws lub peev xwm los yaj ob qho tib si ionic compounds thiab lwm yam polar molecules. cov kua sib xyaw ua ke uas cov khoom me me (cov kuab tshuaj) yog uniformly faib rau hauv cov khoom loj (the kuab tshuaj ).

Tsis tas li ntawd, cov polarity ntawm cov dej ua rau nws muaj peev xwm yaj ntau yam tshuaj li cas? Dej polarity tso cai rau nws yaj lwm polar tshuaj yooj yim heev. Thaum twg a polar yam khoom yog muab tso rau hauv dej , qhov zoo kawg ntawm nws molecules yog attracted rau qhov tsis zoo kawg ntawm lub dej molecules, thiab vice versa. Dej yaj ntau tshuaj dua li lwm cov kua - txawm tias muaj zog acid!

Ib yam li ntawd, tib neeg nug, ua li cas dej ua qhov hnyav?

Dej muaj peev xwm ntawm dissolving ntau yam khoom sib txawv, uas yog vim li cas nws yog xws li ib tug zoo kuab tshuaj . Thiab, dej hu ua "universal kuab tshuaj "vim nws dissolves ntau tshaj li lwm yam kua. Qhov no tso cai rau cov dej molecule los ua attracted rau ntau lwm yam sib txawv ntawm molecules.

Puas yog dej tsis polar?

Dej (H2O) yog polar vim qhov khoov zoo ntawm cov molecule. Yog vim li cas cov duab ntawm cov molecule tsis linear thiab tsis muaj polar (e.g., li CO2) yog vim qhov sib txawv ntawm electronegativity ntawm hydrogen thiab oxygen. Tus nqi electronegativity ntawm hydrogen yog 2.1, thaum lub electronegativity ntawm oxygen yog 3.5.

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