CH=C(CH3)-CH2-CH3+4O-----.>CO2 +H2O+ CH3-C-CH2-CH3
II
O
-CALCULEZ masa de compus pur
p/100= m,pur/m,impur-
80/100= m,pur/26,25----> m,pur= 21g
-calculez numar de moli compus, cu M(miu)=(5x12gC+10gH)/mol=70g/mol
n(niu)= m/M
n= 21g/70g/mol=0,3mol 2metil 1 butena
- calculez moli O, din ecuatie
1mol compus..........4molO
0,3mol..........................x= 1,2molO
-calculez moli bicromat care contin 1,2molO
K2Cr2O7 +4H2SO4=> K2SO4+Cr2(SO4)3+4H2O+3O
1mol.............................................................................3mol
x.......................................................................................1,2mol
calculeaza x !!!!
