1. Definition of Acid
  2. Strength of an Acid
  3. Basicity of an Acid
  4. Characteristics of Acid (Physical Properties)
  5. Preparation of Acids
  6. Reaction of Acids (Chemical Properties)
  7. Uses of Acids


Definition of Acid

Acids are associated with the sour taste we feel when we take fruits such as lemon, lime and oranges especially when they are not ripe. Palm wine left open in the air becomes sour because of the formation of an acid.

An acid is a substance which produces hydrogen ions (or protons) as the only positive ion when dissolved in water. For example, hydrochloric acid (HCl) dissolves in water to form hydrogen ion (H+) and hydroxyl ion (OH). This process is known as ionization. There are two main classes of acids: Organic acids and mineral or inorganic acids. The former occur as natural products in plants or animal materials while the later can be prepared from mineral elements or inorganic matter.

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