AMPHOTERIC (AMPHOLYTE)

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A substance that can act as either an acid or a base in a reaction. For example, aluminum hydroxide can neutralize mineral acids ( Al(OH) 3 + 3 HCl = AlCl 3 + 3 H 2 O ) or strong bases ( Al(OH) 3 + 3 NaOH = Na 3 AlO 3 + 3 H 2 O).