1. Melete Hgo -Br Grether 2.H3O Hydration of aldehydes Ketones The hydration of carbony l compounds is an equilibrium process and the extent of that equilibrium generally paralle ls the reactivity of the parent aldehyde or ketone towards nucleophilic substitution aldehydes are more reactive than ketones and are more highly hydrated at quilibrium. CH3 H H H2O Formation of Cyanohydrins: The reaction of carbonyl compounds with HCN is an equilibrium process and, again, the extent of that equilibrium generally parallels the reactivity of the parent aldehyde or ketone towards nucleophilic substitutionHydration of Aldehydes & Ketones: The hydration of carbonyl compounds is an equilibrium process and the extent of that equilibrium generally parallels the reactivity of the parent aldehyde or ketone towards nucleophilic substitution; aldehydes are more reactive than ketones and are more highly hydrated at equilibrium. Formation of Cyanohydrins: The reaction of carbonyl compounds with HCN is an equilibrium process and, again, the extent of that equilibrium generally parallels the reactivity of the parent aldehyde or ketone towards nucleophilic substitution