1kmol...........................1kmol
85kg..............................30kg
CH2Cl2 + HOH---->CH2O + 2HCl
1700kg........................m=600kg, daca randamentul este 100%
la un randament mai mic, practic se obtine mai putin
m= 600x80/100= 480kg aldehida formica
md=480
c=40%
c=mdx100/ms---> ms=1200kg(formol)