3CH3-CH2-OH + K2Cr2O7 + 4H2SO4 => 3CH3-CH=O + K2SO4 + Cr2(SO4)3 + 7H2O
C(-1) -2e => C(+1). ||6||3
Cr2(+6) +6e=> Cr2(+3). ||2||1
3*46kg C2H5-OH..........3*44kg C2H4O
x=2,3kg.....................................2,2kg
n=m/M=2,3/46=0,05 kmoli =50 moli
5CH3-CH2-OH + 4KMnO4 + 6H2SO4 => 5CH3-COOH + 2K2SO4 + 4MnSO4 + 11H2O
C(-1) -4e => C(+3). ||5
Mn(+7) +5e=> Mn(+2) ||4
5 moli alcool..........4 moli KMnO4
50 moli alcool.....x=40 moli KMnO4
Cm=n/Vs=>Vs=40/0,2=200L KMnO4