Question

In reactia de esterificare a acidului benzoic cu etanol s-au introdus in vasul de reactie 2 moli de alcool si x moli de acid. Stiind ca la echilibru se gasesc 0,5 moli eter si cunoscand constanta de echilibru (kc=4), x are valoarea...?

Answer 1

C₆H₅-COOH+ -OH⇆C₆H₅-CO-O-C₂H₅+H₂O

n ester= n apa= n acid consumat=n alcool consumat

n acid la echilibru =x-0.5 moli

n alcool la echilibru=2-0.5=1.5 moli

Kc=0.5*0.5/(x-0.5)*1.5=4

x=0.541 moli acid benzoic