correction d'exercices
20 sept. 2005 ... Le 20/09/05 Correction des exercices. Chimie. P41 n°14. 1°) 2 Cr2O72- + 28 H+
+ 3 CH3CH2OH + 3 H2O 4 Cr3+ + 14 H2O + 3 CH3CO2H + ...
20 sept. 2005 ... Le 20/09/05 Correction des exercices. Chimie. P41 n°14. 1°) 2 Cr2O72- + 28 H+
+ 3 CH3CH2OH + 3 H2O 4 Cr3+ + 14 H2O + 3 CH3CO2H + ...