Qhov sib txawv tseem ceeb ntawm oxidation muaj peev xwm thiab txo qhov peev xwm yog tias oxidation muaj peev xwm qhia tau qhov nyiam ntawm cov khoom siv tshuaj oxidized. Hauv qhov sib piv, txo qhov peev xwm qhia tau tias qhov kev nyiam ntawm cov khoom siv tshuaj txo qis.
Oxidation muaj peev xwm thiab txo qhov muaj peev xwm yog ob hom electrode muaj txiaj ntsig rau cov tshuaj lom neeg uas tau muab rau hauv Volts ntawm cov qauv txheej txheem. Yog li ntawd, peb hu lawv tus qauv oxidation muaj peev xwm thiab tus qauv txo qhov peev xwm. Tus nqi ntawm cov peev txheej no txiav txim siab lub peev xwm ntawm ib hom tshuaj lom neeg los mus rau oxidation / txo qis.
Oxidation Potential yog dab tsi?
Lub peev xwm oxidation yog tus nqi uas qhia txog qhov nyiam ntawm hom tshuaj oxidized. Hauv lwm lo lus, nws yog lub peev xwm ntawm electrode kom poob electrons (kom tau txais oxidized). Feem ntau, tus nqi no yog muab rau ntawm tus qauv; Yog li ntawd, peb yuav tsum tau lub npe nws raws li tus qauv oxidation peev xwm. Lub denotation rau lo lus no yog SOP. Nws yog ntsuas nyob rau hauv Volts. Thiab, qhov no zoo ib yam li tus qauv txo qhov peev xwm, tab sis lawv txawv ntawm qhov kos npe ntawm tus nqi, piv txwv li tus nqi ntawm tus qauv oxidation muaj peev xwm yog qhov tsis zoo ntawm tus qauv txo peev xwm. Peb tuaj yeem sau cov peev txheej oxidation raws li ib nrab cov tshuaj tiv thaiv. Cov qauv dav dav rau cov tshuaj tiv thaiv oxidation thiab oxidation muaj peev xwm rau tooj liab yog muab hauv qab no:
Ib nrab cov tshuaj tiv thaiv ntawm tooj liab oxidation: Cu(s) ⟶ Cu2+ + 2e–
Tus nqi rau tus qauv oxidation muaj peev xwm rau cov tshuaj tiv thaiv saum toj no (oxidation ntawm tooj liab) yog -0.34 V.
Yuav txo qhov peev xwm yog dab tsi
Txo qhov peev xwm yog qhov nyiam ntawm cov tshuaj tshwj xeeb kom txo qis. Qhov ntawd txhais tau tias; hom tshuaj tshwj xeeb no txaus siab txais cov khoom siv hluav taws xob sab nraud (kom txo tau). Nws yog ntsuas hauv Volts thiab feem ntau ntsuas raws li tus qauv. Yog li ntawd, peb tuaj yeem hu nws ua tus qauv txo qhov peev xwm. Lub ntsiab lus rau lo lus no yog SRP. Peb tuaj yeem sau nws hauv daim ntawv ntawm kev txo qis ib nrab ntawm cov tshuaj tiv thaiv. Cov qauv dav dav thiab tooj liab ua piv txwv tau muab hauv qab no:
Ib nrab cov tshuaj tiv thaiv ntawm tooj liab txo: Cu2+ + 2e– ⟶ Cu(s)
Tus nqi rau tus qauv txo qhov muaj peev xwm rau cov tshuaj tiv thaiv saum toj no (txo cov tooj liab) yog 0.34 V, uas yog tus nqi tseeb, tab sis qhov sib txawv kos npe los ntawm qhov muaj peev xwm oxidation ntawm tib hom tshuaj, tooj liab. Yog li ntawd, peb tuaj yeem tsim kev sib raug zoo ntawm tus qauv oxidation thiab txo qhov peev xwm raws li hauv qab no:
E00(SRP)=-E00 (SOP)
Dab tsi yog qhov txawv ntawm Oxidation Peev Xwm thiab Txo Cov Peev Xwm?
Oxidation muaj peev xwm thiab txo qhov muaj peev xwm yog ob hom electrode muaj txiaj ntsig rau cov tshuaj lom neeg uas tau muab rau hauv Volts ntawm cov qauv txheej txheem. Qhov sib txawv tseem ceeb ntawm oxidation muaj peev xwm thiab txo qhov muaj peev xwm yog qhov muaj peev xwm oxidation qhia qhov nyiam ntawm cov khoom siv tshuaj oxidized, whereas qhov txo qhov peev xwm qhia tau hais tias qhov kev nyiam ntawm cov khoom siv tshuaj raug txo. Txij li cov peev txheej muaj peev xwm ntsuas tau ntawm cov qauv txheej txheem, peb yuav tsum muab lawv lub npe raws li tus qauv oxidation peev xwm thiab tus qauv txo qhov peev xwm.
Ntxiv mus, peb qhia lawv li SOP thiab SRP. Tsis tas li ntawd, muaj kev sib raug zoo ntawm ob nqe lus no; tus qauv oxidation muaj peev xwm yog tus nqi tib yam tab sis nrog ib qho txawv kos npe los ntawm tus qauv txo qhov peev xwm.
Hauv qab infographic qhia txog qhov sib txawv ntawm oxidation muaj peev xwm thiab txo qhov peev xwm.
Summary – Oxidation Potential vs Reduction Potential
Lub peev xwm oxidation thiab txo qhov peev xwm yog ob hom electrode muaj txiaj ntsig zoo rau cov tshuaj lom neeg uas tau muab rau hauv Volts ntawm cov txheej txheem. Qhov sib txawv tseem ceeb ntawm oxidation muaj peev xwm thiab txo qhov muaj peev xwm yog qhov muaj peev xwm oxidation qhia qhov nyiam ntawm cov khoom siv tshuaj oxidized, whereas qhov txo qhov muaj peev xwm qhia tau qhov nyiam ntawm cov tshuaj lom neeg kom txo tau.
