Question

propanoic acid to ethyl bromide

Answer 1

Explanation:

onvert the ethyl bromide into Grignard's reagent, ethyl magnesium bromide then allow to react with dry ice (Solid carbon dioxide) then acidic hydrolysis produces the propionic acid.

CH3-Br + Mg --- anhydrous ether---> CH3-CH2-Mg-Br

CH3-CH2-Mg-Br + CO2 ----H+/H2O---> CH3-CH2-COOH