Chromic Sulfate → Chromium
Reaktionsgleichung
[Cr+3:1].[S:2]([O-:6])([O-:5])(=[O:4])=[O:3].[Cr+3].[S:8]([O-:12])([O-:11])(=[O:10])=[O:9].[S:13]([O-:17])([O-:16])(=[O:15])=[O:14].[Cr+3]>>[S:2]([O-:6])([O-:5])(=[O:4])=[O:3].[Cr+3:1].[S:8]([O-:12])([O-:11])(=[O:10])=[O:9].[S:13]([O-:17])([O-:16])(=[O:15])=[O:14].[Cr+3:1].[Cr:1]Komponenten
4
Versuchsvorschrift
This corresponds, given M(Cr2O3)=152 g/mol, M(Cr)=52 g/mol and M(O)=16 g/mol, to a value of 9.58 g of chromium(III) ions which the float must contain at a minimum. Based on 400 g of float, the use of chromium sulphate as tanning agent results in M(Cr2(SO4)3)=392 g/mol, M(S)=32 g/mol, M(Cr)=52 g/mol, M(O)=16 g/mol→26.53% of chromium in chromium sulphate.
Quellen und Nachweise
- ORD-Eintrag
- ord-9a63129f2e7d4521b5830267cc671d01