Concentration of base increases with the increase in OH- ions.
An alkali or base is a compound which when dissolved in water yields hydroxyl ions (OH–) as the only negatively charged ion. The Strength of a base depends upon the concentration of hydroxyl ions.
Properties of base
- When they are touched, they have a soapy feel.
- When these compounds are dissolved in water, they contain hydroxide ions (OH– ions).
- Bases are strong conductors of electricity in their aqueous solutions.
- The pH values associated with bases are often higher than 7.
- Bases are bitter-tasting compounds that can turn red litmus paper blue.
Examples of base compound: Calcium hydroxide, Sodium hydroxide.