2C6H5-CH3 +2Cl2 ----C6H3Cl2-CH3 +2HCl pe catalizator, rezulta orto si para cloro-tolue-
-calculez moli NaOH din solutie
c,m= niu/V; niu= 0,9mol/lx5l=4,5mol NaOH
1mol 1mol-
NaOH +HCl =NaCl +H2o
4,5mol. .4,5mol
- din prima ecuatie ,rezulta:
2mol toluen......2mol HCl
niu=4,5.............4,5
m, toluen= 4,5molx(7x12gC+8gH)/mol=414g