Base + X → Salt + H2O
Find X ?
X can be either an acid or a metal.
X can be either an metal carbonate or a metallic oxide.
X can be either a non-metallic oxide or a metallic oxide.
X can be either a non-metallic oxide or an acid.
Base + Non-metallic oxide → Salt + Water ;
Base + Acid → Salt + Water ;
Find X.
An amphoteric oxide is an oxide that can act as either an acid or a base in a reaction.