A m ph ote ric Su bsta n ce s as Acid s an d Base s Engineering Chemistry By R umman ShajaratI n d ex S ectio n s P age No. G RA PH IC A L ABST R A CT 2 I N TR O DUCTIO N 3 S T R U CTU RA L AND M EC H ANIS T IC DUALIT Y 4 -8 R EA L WORLD APPL IC ATIO NS O F AM PH OTER IC SU BSTA NCES 9 -1 1 C O NCLU SIO N 1 2 R EFE R EN CES 1 3 1G RAPH IC AL ABST R ACT: Fig : Illustration of an amphoteric substances ability both as an acid and a base. 2INTRODUCTION The idea of acids and bases are one of the most important concepts in chemistry. A Long time ago, people recognized acids because they tasted sour and bases because they tasted bitter.[ 1 ] After that, scientists developed more detailed and scientific definitions for acids and bases. These ideas helped us understand how different chemicals react.But in reality, chemistry is not always so black and white. Some substances dont choose just one side ,