This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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Here are the solutions to the questions: 5. (b) (iv) The compound P can be obtained from the reaction of ethanal and HCN. Write a mechanism for the Reaction. Compound P is 2-hydroxypropanenitrile (CH_3CH(OH)CN). This is formed by the nucleophilic addition of cyanide to ethanal (CH_3CHO). The reaction is typically catalyzed by a base (e.g., CN^- from KCN) to generate the nucleophilic cyanide ion. Mechanism: Step 1: Nucleophilic attack by the cyanide ion on the carbonyl carbon of ethanal. The -electrons of the C=O bond shift to the oxygen atom, forming an alkoxide intermediate. CH_3CHO + CN^- CH_3CH(O^-)CN Step 2: Protonation of the alkoxide ion by HCN (or water) to form the cyanohydrin and regenerate the cyanide ion. CH_3CH(O^-)CN + HCN CH_3CH(OH)CN + CN^- Overall reaction: CH_3CHO + HCN CN^- CH_3CH(OH)CN (v) What name is given to the type of reaction between this reaction ethanal and HCN? The type of reaction is Nucleophilic addition.