HCOOH + R-C-OH <------> HCO-O-C-R + H2O
ACID.................ALCOOL...................ESTER...................APA
I y moli 8 moli
C x moli x moli x moli x moli
E y-6 moli 2 moli 6 moli 6 moli
I = initial
C = consumat
E = echilibru
Kc = 3 = (6*6)/ [(y-4) *2] => 36/2y - 8 = 3 => y =10,5 moli