Question

pentru oxidarea 3-hidroxi-1-butena se consuma un volum de k2cr2o7 1N in mediu acid de 2 litri.Cati moli s-au oxidat : A.0,16 B.1,5 C.2,66 D.3 E.3,33

Answer 1

Eg=MK2Cr2O7/nr.e- schimbati=294/6=49
Cn=Eg/l=49g/l
insa n=m/M=49/294=0,1666moli
Cm=0,166moli/l=0,166M
n=Cm*Vs=0,166*2=0,333 moli
1mol................................................................................3moli
K2Cr2O7 + 4H2SO4 -> K2SO4 + Cr2(SO4)3 + 4H2O + 3[O]
0,333moli........................................................................1mol
1mol...............................6moli
CH2=CH-CH(OH)-CH3 + 6[O] -> CO2 + H2O + HOOC-CO-CH3
0,16moli.........................1mol