The most common feature of many acids is the presence of the hydrogen ion, H+

Acid Identification 

Concept #1: Binary Acids contain the hydrogen ion, H+, connected to an electronegative nonmetal that excludes oxygen. 

Concept #2: Oxyacids contain the hydrogen ion, H+, connected to a polyatomic ion containing oxygen. 

Example #1: Which of the following compound(s) cannot be classified as an acid?

       a)  H2Se           b) HOCN           c)  HN3           d)  C3H8           e) All are acids.

Ionic Salts

Concept #3: Cations can either be acidic or neutral depending on their identity. 

Concept #4: Anions can either be basic or neutral depending on their identity. 

Concept #5: Amphoteric Species can be either acidic or basic depending on their Ka or Kb values.