Question

Se esterifica 1 mol acid etanoic cu 2 moli etanol . Calculaticonversia acidului etanoic in reactia de esterificare daca kc= 4

Answer 1

                                 acid          +           alcool      ⇄        ester           +            apa
initial :                        1 mol                  2 moli
au reactionat :            x                             x
la echilibru :            (1-x)                       (2-x)                       x                                  x
Kc = [ester][H2O] /{[acid][alcool]}
x² /[(1-x)(2-x)] = 4         x² = 4(2 - 3x + x²)       3x² - 12x + 8 = 0   x = 0,845
Cu = 0,8453·100/1 = 84,53%