It is water’s Ionization Property. Water
Ionization also known as self-ionization or auto ionization of water creates a
positive and Negative ion which is essential for chemical reactions. It is a
reaction of pure water in where a water molecule and H2O combined to make a
hydroxide ion. It usually occurs due to the electric field fluctuation between
2 neighbouring molecules. It is a property of pure water that mixed or
dissociates to from a new substance which is a hydrogen ion (positive ion) and
hydroxide ions (negative ion)