# Acid catalyzed hydrolysis of ester

During acid catalyzed hydrolysis of ester why does the carbonyl oxygen attack the $\ce{H^{+}}$ ? Why doesn't the alkoxy oxygen which is more electron rich and less electronegative not attack the $\ce{H^{+}}$ with its lone pair? Any ideas?

• Why do you think that it is more electron rich? – Del Pate Apr 28 '15 at 13:32
• Because one is sp2 hybrid while other is sp3 hybrid. – user14857 Apr 28 '15 at 14:06