Vim li cas cr2+ txo thiab mn3+ oxidizing?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Cr2+ yog muaj zog txo nyob rau hauv qhov. Thaum ua raws li ib tug txo tus neeg sawv cev, nws tau txais oxidized rau Cr3+ (electronic configuration, d3). Qhov d3configuration no tuaj yeem sau ua t32g teeb tsa, uas yog qhov kev teeb tsa ruaj khov dua. Nyob rau hauv cov ntaub ntawv ntawm Mn3+ (d4), nws ua raws li ib tug oxidizing tus neeg sawv cev thiab tau txo rau Mn2+ (d5).

Kuj tseem paub yog, vim li cas cr2+ muaj zog txo tus neeg sawv cev?

Tiag tiag, Cr2+ yog a muaj zog txo tus neeg sawv cev Raws li oxidation nws dhau los ua Cr3+. Nyob rau hauv Cr3 +, peb electrons tam sim no nyob rau hauv xws li theem (Crystal teb splitting vim dej ligands). Li no, piv txwv li yog ib nrab-sau, Cr3+ yog qhov ruaj khov heev. Tab sis rau Fe2+ rau Fe3+ qhov kev hloov pauv yog kom tsis tshua muaj kev ruaj khov d5 teeb tsa.

Qhov thib ob, lub ntsiab lus twg muaj zog txo tus neeg sawv cev hauv 2 lub xeev oxidation thiab vim li cas? Hauv Cr²+, chromium yog nyob rau hauv +2 oxidation xeev. Maximum oxidation xeev qhia los ntawm chromium yog +6. Yog li nws yuav poob electrons kom ua tiav lub xeev oxidation siab tshaj plaws ntawm +6 los ntawm +2. Tus neeg saib xyuas txo qis qis dua oxidation, yog li Cr² + ua raws li tus neeg sawv cev muaj zog.

Nyob rau hauv no txoj kev, uas yog ib tug muaj zog oxidizing neeg sawv cev mn3+ thiab cr3+?

3) Tawm ntawm Cr³⁺ thiab Mn³⁺ , Mn³⁺ yog a muaj zog oxidizing tus neeg sawv cev vim tias nws muaj 4 electrons hauv nws lub plhaub valence thiab thaum nws tau txais ib lub electron los ua Mn²⁺, nws ua rau ib nrab puv (d⁵) configuration uas muaj kev ruaj ntseg ntxiv.

Puas yog Chromium yog oxidizing tus neeg sawv cev?

Chromium ion muaj valency ntawm 3 thiaj li yuav tau stabilized. Chromate yog ib qho oxidizing tus neeg sawv cev . Hauv chromate, lub oxidation tus lej ntawm chromium yog +6 uas siab tshaj 3. Yog li kom tau stabilized nws yuav tsum tau 3 electrons.