Răspuns:
date necesare
miu,C6H5CH3= 92g/mol
miu,C6H5COOH= 122g/mol
-calculez moli toluen
niu=m/miu= 13,8/92mol= 0,15mol
-deduc moli acid benzoic din ecuatia
1mol.........................................1mol
C6H5-CH3+ 3O----> C6H5-COOH+ H2O
0,15mol........................................x
x= 0,15mol acid benzoic
-calculez masa de acid pur
m= niuxmiu= 0,15x122g= 18,3g
-calculez masa de acid impur
p=m,px100/m i--->m,i= 18,3x100/6-g= 30.5g
Explicație: