Qhov sib txawv tseem ceeb ntawm ib qho hluav taws xob muaj peev xwm thiab tus qauv hluav taws xob muaj peev xwm yog qhov muaj peev xwm ntawm ib qho hluav taws xob yog qhov muaj peev xwm ntawm ib qho hluav taws xob hauv ib qho hluav taws xob hluav taws xob thaum tus qauv hluav taws xob muaj peev xwm yog qhov sib txawv ntawm ob lub electrodes ntawm cov txheej txheem.
Ib lub xov tooj hluav taws xob hluav taws xob yog ib qho khoom siv uas tuaj yeem tsim hluav taws xob siv tshuaj lom neeg lossis siv hluav taws xob los ua tshuaj lom neeg. Nws muaj ob electrodes li cathode thiab anode. Txhua lub electrode yog hu ua ib nrab ntawm tes, qhov twg ib nrab ntawm cov tshuaj tiv thaiv redox tshwm sim. Hluav taws xob yog tsim los ntawm cov hluav taws xob muaj peev xwm ntawm ob lub electrodes. Yog tias peb xav txog lub peev xwm ntawm ib nrab ntawm tes, peb hu nws "ib qho hluav taws xob muaj peev xwm". Peb tsis tuaj yeem ntsuas nws, thiab nws ib txwm ntsuas piv rau lub peev xwm ntawm lwm cov electrode.
Kev Muaj Peev Xwm Ib Leeg Electrode yog dab tsi?
Ib qho hluav taws xob muaj peev xwm yog qhov muaj peev xwm ntawm ib nrab ntawm lub xov tooj ntawm tes hluav taws xob. Ib tug electrochemical cell muaj ob ib nrab hlwb. Feem ntau, txhua ib nrab ntawm tes yog hlau electrode. Cov hlau no tso tawm lawv cov ions mus rau hauv cov electrolyte (cov tshuaj uas cov electrodes yog immersed) yog tias muaj qhov qhib Circuit Court. Yog li ntawd, cov electrode no tuaj yeem tsim muaj hluav taws xob nyob ib puag ncig nws tus kheej. Yog li, nws yog qhov peb hu ua ib lub peev xwm electrode.
Daim duab 01: A Daniel Cell
Piv txwv li, hauv Daniel cell, lub anode yog Zinc, thiab cathode yog tooj liab. Ntawm no, cov anode tsim cov nqi tsis zoo thaum lub cathode tsim cov nqi zoo. Cov nqi no ib tus zuj zus txiav txim siab tib lub peev xwm ntawm cov electrodes. Tsis tas li ntawd, muaj peb yam uas muaj peev xwm nyob ntawm; Cov concentration ntawm ions hauv cov tshuaj, nyiam tsim ions thiab kub.
Tus Txheej Txheem Electrode Potential yog dab tsi
Standard electrode muaj peev xwm yog lub peev xwm ntawm ib nrab ntawm tes ntawm cov txheej txheem. Nyob rau hauv ib qho hluav taws xob hluav taws xob, hluav taws xob yog tsim los ntawm qhov sib txawv ntawm ob lub electrodes. Tsis muaj txoj hauv kev los ntsuas lub peev xwm electrode yooj yim thiab raug. Ntxiv mus, nws txawv nrog qhov kub thiab txias, concentration thiab siab ntawm qhov system. Yog li ntawd, peb yuav tsum tau txhais cov txheej txheem electrode muaj peev xwm.
Daim duab 02: Tus Qauv Electrode Muaj peev xwm ntawm Zinc
Tus txheej txheem electrode muaj peev xwm yog lub peev xwm ntawm lub tshuab hluav taws xob ntawm 1-atmosphere siab, 25 ° C kub thiab 1M molar concentration ntawm ions hauv electrolyte. Txij li thaum peb tsis tuaj yeem ntsuas tus kheej lub peev xwm electrode, peb ntsuas tus qauv tus nqi tiv thaiv tus qauv hydrogen electrode peev xwm.
Dab tsi yog qhov txawv ntawm Ib Leeg Electrode Muaj Peev Xwm thiab Tus Txheej Txheem Electrode Muaj Peev Xwm?
Ib lub xov tooj hluav taws xob muaj ob lub electrodes hu ua ib nrab hlwb. Lub peev xwm hluav taws xob ntawm ib qho hluav taws xob yog ib qho hluav taws xob muaj peev xwm. Txawm li cas los xij, yog tias peb ntsuas nws ntawm tus qauv, ces peb hu nws tus qauv electrode peev xwm. Yog li, qhov sib txawv tseem ceeb ntawm ib qho hluav taws xob muaj peev xwm thiab cov qauv hluav taws xob muaj peev xwm yog qhov muaj peev xwm ntawm ib qho hluav taws xob yog qhov muaj peev xwm ntawm ib qho hluav taws xob hauv ib qho hluav taws xob hluav taws xob thaum tus txheej txheem electrode muaj peev xwm yog qhov sib txawv ntawm ob lub electrodes ntawm cov txheej txheem. Ntxiv mus, cov txheej txheem yog cov qauv hydrogen electrode muaj peev xwm.
Cov hauv qab no qhia cov ntsiab lus ntxiv ntawm qhov sib txawv ntawm ib qho hluav taws xob muaj peev xwm thiab tus qauv electrode peev xwm.
Summary – Ib Leeg Electrode Potential vs Standard Electrode Potential
Ib lub xov tooj hluav taws xob muaj ob lub electrodes. Peb hu lub peev xwm ntawm electrode "ib qho hluav taws xob muaj peev xwm". Qhov sib txawv tseem ceeb ntawm ib qho hluav taws xob muaj peev xwm thiab cov txheej txheem electrode muaj peev xwm yog tias ib qho hluav taws xob muaj peev xwm yog lub peev xwm ntawm ib qho hluav taws xob hauv ib qho hluav taws xob hauv hluav taws xob thaum tus qauv hluav taws xob muaj peev xwm yog qhov sib txawv ntawm ob lub electrodes ntawm cov qauv txheej txheem.
