How do bases differ from acids in properties? Give examples.

Bases are the chemical opposite of acids. Acids are defined as compounds that feed a hydrogen ion (H +) to another compound (called a base). Traditionally, an acid is any chemical compound that, when dissolved in water, gives a solution with a hydrogen ion activity higher than in pure water, that is, a pH of less than 7.0. Accordingly, a base is any compound that, when dissolved in water, gives a solution with a hydrogen ion activity lower than that of pure water, that is, a pH higher than 7.0 under standard conditions.