What is the importance of pH?
It measures concentration of hydroxide ions only
It measures the strength of bases only
It measures the strength of acids only
It measures the strength of both acids and bases
pH is used to measure the strength of both acids and bases.
The strength of an alkali depends on the concentration of the hydroxyl or the hydroxide ions produced by it in aqueous solution state I.e ., when dissolved in water.
But how is the strength of a base determined if it is not water soluble?