How many moles of acetic anhydride are stoichiometrically required to completely acetylate one mole — Biomolecules Chemistry Question

💡 Solution & Explanation

Cyclic $\alpha$ -D-glucopyranose features five free hydroxyl (-OH) groups per molecule (one at the anomeric hemiacetal carbon, and four standard alcoholic groups at C2, C3, C4, C6). Each hydroxyl reacts with one equivalent of acetic anhydride, consuming 5 moles in total to form glucose pentaacetate.