Question

Can you check my answers please?

To answer the questions below use the following information: Cyanohydrins are important intermediates in the synthesis of c-hydroxycarboxylic acids from ketones and aldehydes. The nitrile functional group can be hydrolyzed by aqueous acid to yield a carboxylic acid. Nitriles can also be hydrolyzed to carboxylic acids using aqueous base. Unfortunately, when a cyanohydrin is treated with aqueous base the original carbonyl compound is isolated OH CHCOOH HO CN OBU H HCEN H NAOH H20 OEU culin + N.CN + H2O reaction. 19. The reaction of an aldehyde with hydrogen cyanide is an example of A a nucleophilic substitution an electrophilic addition an electrophilic substitution a nucleophilic addition 20. Identify the nucleophile in the reaction of benzaldehyde with hydrogen cyanide. the CN- is the Nucleophile 21. The reaction of benzaldehyde with hydrogen cyanide is catalyzed by the addition of a small amount of KCN. Write the complete reaction mechanism for the KCN-catalyzed reaction. Show all electron flow with arrows and show all intermediate structures. KEN K+ + CN WHt CN CNO VOH N