This document discusses base hydrolysis and factors that affect the rate of base hydrolysis. There are two types of hydrolysis - acidic and base hydrolysis. Base hydrolysis occurs when a reaction takes place in a basic medium, where a ligand is replaced by an OH- group. There are two mechanisms for base hydrolysis - dissociative and associative. Factors like chelating and steric hindrance increase the rate of the reaction, while increasing the electronegativity of the ligand decreases the rate due to reduced pi bonding and lability of the ligand.