Hi all, I was wondering if anyone could help me with classing the following oxides as AMPHOTERIC. Ie) They act as both lewis acids and bases. My text book does not have a very thorough description. Here's the list, with the ones I already know. Li_2O BeO CO_2 -Only a Lewis Acid P_4O_6 Cl_2O Al_2O_3 -Amphoteric BeO SnO_2 -Amphoteric Br_2O_7 PbO_2 -Amphoteric Cheers for any help, It will be much appreciated.