Qhov sib txawv tseem ceeb ntawm kev tsis sib haum xeeb thiab redox yog qhov tsis sib xws ntawm cov tshuaj tiv thaiv, tib lub reactant tau oxidation thiab txo. Tab sis, hauv cov tshuaj tiv thaiv redox, ob qhov sib txawv reactants feem ntau raug oxidation thiab txo.
Tsis tas li ntawd, qhov tsis txaus ntseeg yog cov tshuaj tiv thaiv tshuaj uas lub molecule hloov mus rau hauv ob lossis ntau dua cov khoom sib txawv thaum cov tshuaj tiv thaiv redox yog ib hom tshuaj tiv thaiv uas oxidation thiab txo qis ib nrab ntawm kev tshwm sim ib txhij. Qhov tseem ceeb tshaj plaws, qhov tsis sib xws yog hom tshuaj tiv thaiv redox vim tias muaj ob qho tib si oxidation thiab txo cov tshuaj tiv thaiv.
Dab tsi yog qhov tsis txaus ntseeg?
Disproportionation yog tshuaj lom neeg cov tshuaj tiv thaiv uas lub molecule hloov mus rau hauv ob lossis ntau dua cov khoom sib txawv. Hauv paus, nws yog ib hom tshuaj tiv thaiv redox qhov twg tib lub molecule undergoes oxidation thiab txo. Tsis tas li ntawd, qhov rov qab ntawm cov tshuaj tiv thaiv no yog hu ua comproportionation. Daim ntawv dav dav ntawm cov tshuaj tiv thaiv no yog raws li hauv qab no:
2A ⟶ A' + A"
Tsis tas li ntawd, qee qhov piv txwv rau hom kev tawm tsam no yog raws li hauv qab no
Kev hloov pauv ntawm hydrogen peroxide rau hauv dej thiab oxygen
2H2O2 ⟶ H2O + O 2
Disproportionation of mercury(I) chloride
Hg2Cl2 →Hg + HgCl2
Disproportionation ntawm phosphoric acid rau hauv phosphoric acid thiab phosphine
4 H3PO3 → 3 H3PO 4 + PH3
Kev tsis txaus ntawm bromine fluoride muab bromine trifluoride thiab bromine
3 BrF → BrF3 + Br2
Daim duab 01: Disproportionation of Toluene
Redox yog dab tsi?
Redox cov tshuaj tiv thaiv yog ib hom tshuaj tiv thaiv uas oxidation thiab txo ib nrab-reactions tshwm sim ib txhij. Ntxiv mus, hauv cov tshuaj tiv thaiv no, peb xav txog oxidation thiab txo qis raws li cov txheej txheem ntxiv. Ntawm no, oxidation yog qhov poob ntawm electrons lossis nce hauv lub xeev oxidation thaum txo yog qhov nce ntawm electrons lossis txo qis ntawm oxidation xeev.
Daim duab 02: Rusting
Tsis tas li ntawd, tus nqi ntawm cov tshuaj tiv thaiv redox tuaj yeem sib txawv los ntawm cov txheej txheem qeeb heev xws li xeb mus rau cov txheej txheem ceev xws li roj hlawv.
Dab tsi yog qhov txawv ntawm Disproportionation thiab Redox?
Qhov sib txawv tseem ceeb ntawm kev tsis sib haum xeeb thiab redox yog qhov tsis txaus ntseeg cov tshuaj tiv thaiv tib yam reactant tau oxidation thiab txo qis, whereas, hauv cov tshuaj tiv thaiv redox, ob qhov sib txawv reactants feem ntau raug oxidation thiab txo. Xav txog qee qhov piv txwv, qhov tsis sib xws suav nrog qhov tsis sib xws ntawm mercury (I) chloride los tsim cov mercury thiab mercury (II) chloride, disproportionation ntawm bromine fluoride los ua bromine trifluoride thiab bromine, thiab lwm yam. whereas rusting, combustion, fuel burning, etc. cov tshuaj tiv thaiv.
Cov hauv qab no qhia txog qhov sib txawv ntawm qhov tsis sib xws thiab redox.
Summary – Disproportionation vs Redox
Disproportionation yog cov tshuaj tiv thaiv tshuaj uas lub molecule hloov mus rau hauv ob lossis ntau dua cov khoom sib txawv thaum cov tshuaj tiv thaiv redox yog ib hom tshuaj tiv thaiv uas oxidation thiab txo ib nrab-reactions tshwm sim ib txhij. Qhov sib txawv tseem ceeb ntawm qhov tsis sib xws thiab redox yog tias nyob rau hauv qhov tsis sib haum xeeb cov tshuaj tiv thaiv tib yam reactant tau oxidation thiab txo qis, whereas nyob rau hauv cov tshuaj tiv thaiv redox, feem ntau, ob qhov sib txawv reactants undergo oxidation thiab txo.
