Aldehydes txo dichromate los ntawm +6 mus rau +3 oxidation xeev, hloov xim ntawm txiv kab ntxwv mus rau ntsuab. Qhov kev hloov xim no tshwm sim vim cov aldehyde tuaj yeem oxidized rau cov carboxylic acid sib raugIb ketone yuav tsis muaj qhov hloov pauv vim nws tsis tuaj yeem oxidized ntxiv, thiab yog li cov tshuaj yuav nyob twj ywm txiv kab ntxwv.
Vim li cas K2Cr2O7 Xim?
KMno4 thiab K2Cr2O7 muaj xim vim ntawm tus nqi hloov pauv spectra Nyob rau hauv ob qho tib si ntawm cov tebchaw no thiab cov hluav taws xob los ntawm cov pa oxygen ib leeg ua cim orbital raug xa mus. Nyob rau hauv ob qho tib si cov tebchaw muaj anion rau cation them nqi hloov lwm lub tsev kuj hu ua ligand rau hlau nqi hloov.
Vim li cas dichromate txiv kab ntxwv?
- Hauv nruab nrab nruab nrab, potassium dichromate cov ntaub ntawv chromate ions (CrO₄²⁻). Cov chromate ions no muaj xim daj. - Thaum nyob hauv acidic nruab nrab, potassium dichromate cov ntaub ntawv dichromate ions (Cr₂O₇²⁻). Cov dichromate ions no yog txiv kab ntxwv hauv xim.
Vim li cas K2Cr2O7 yog txiv kab ntxwv hauv acidic thiab daj hauv qhov pib?
Nws yog xim hloov ntawm txiv kab ntxwv mus rau daj vim yog tsim ntawm chromate (cro4-2) thaum nyob rau hauv theem pib. Nws rov hloov ntawm daj mus rau txiv kab ntxwv.
Puas yog potassium dichromate txiv kab ntxwv xim?
$ {K_2}C{r_2}{O_7} $ lossis Potassium dichromate muaj a liab-txiv kab ntxwv crystalline solid Nws kuj yog siv los ua tus neeg sawv cev oxidizing muaj zog thiab siv los ua hloov $ 1 ^ / circ $ cawv ncaj qha rau carboxylic acid thiab $ 2 ^ / circ $ cawv rau ketones. Nws yog ntxhiab tsw thiab soluble hauv dej.
