The decreased acidity of para-methoxybenzoic acid can be explained by the the methoxy group, which cause the the aromatic ring. The resulting partial charge in the ring (caused by the methoxy group) serves to the negative charge in the conjugate base. The increased acidity of meta-methoxybenzoic acid can be explained by the effects of the methoxy group, which cause the the aromatic ring. The resulting partial charge in the ring (caused by the methoxy group) serves to the negative charge in the conjugate base. Last saved 36 minutes ago. Saved work will be auto-submitted on the due date. Auto-submission can take up to 10 minutes.