CH3-CH2-OH --(-H2O) => CH2=CH2
ro=ms/V=>ms=12*0,8=9,6g alcool
C=md/ms*100=>md=9,2g alcool
n=m/M=9,2/92=0,1 moli alcool
nalcool=nC2H4=0,1 moli
3CH2=CH2 + 2KMnO4 + 4H2O => 3CH2(OH)-CH2(OH) + 2KOH + 2MnO2
C(-2) -1e=> C(-1). ||3
C(-2) -1e=> C(-1). ||3
Mn(+7) +3e=> Mn(+4). ||2
3 moli C2H4........2*158g KMnO4
0,1 moli C2H4........x=10,53333g KMnO4
C=md/ms*100=>ms=1053,333/20=52,666g sol KMnO4
nu sunt sigur..