11. Dab tsi yog poov tshuaj Dichromate thiab sodium dichromate?

Poov tshuaj Dichromate (K₂CRORO₇), feem ntau yog paub txog poov tshuaj liab alum, yog txiv kab ntxwv {{{{1} zoo li crystal. Nws muaj lub ntsiab lus melting ntawm 398℃thiab lub qhov cub npau npau ntawm 500℃(decomposes). Cov tshuaj yog dej - Soluble, sib sau ua cov kua qaub nrog kev xeb, tshuaj lom, thiab muaj zog oxidizing tej yam.
Sodium Dichromate (Na₂Cromate (Na₂Cr₂₇₂ (na₂Cr₂₇₂ (Na₂Cr₂₇₂), feem ntau yog hais tias sodium liab alum, muaj li Monoclincic lossis koob- zoo li muaju. Nws muaj qhov taw tes melting ntawm 320℃thiab lub qhov cub npau npau ntawm 600℃(decomposes). Ntawm 100 degree, nws poob nws cov dej ntawm crystallization los ua anhydrody dichromate, uas yaj thiab decomposes ntawm 400 degree, tso oxygen. Qhov no hygroscopic compound yog soluble tsis tshua muaj zog hauv dej, sib sau ua xeb thiab muaj kuab lom. Nws cov aqueous pom cov khoom acidic thiab muaj txiaj ntsig oxidizing muaj peev xwm.