Describe Arrhenius's theory of acids and bases

 Arrhenius's Theory of Acids and Bases:

• The Arrhenius theory of acids and bases was proposed by Swedish chemist Svante Arrhenius in 1887.
• According to this theory, an acid is a substance that increases the concentration of hydrogen ions (H+) in a solution, and a base is a substance that increases the concentration of hydroxide ions (OH-) in a solution. 
• This theory is based on the simple ionization of water, where water molecules dissociate into hydrogen ions (H+) and hydroxide ions (OH-)