Benzoic acid was synthesized by carbonating a Grignard reagent. In a first step, 8.0 grams of dry magnesium shavings and a small iodine crystal, 15.0 grams of bromobenzene and 20 mL of dry ether are mixed. After gentle heating, the iodine decolorized, which was a sign that the Grignard reagent C 6 H 5 MgBr had been formed. After the Grignard reagent is separated, it is allowed to react with carbon dioxide (CO 2 (s)) and excess dilute hydrochloric acid (forming benzoic acid and MgClBr). Benzoic acid formed is transferred to the anion form by addition of NaOH and the organic and aqueous phases are separated. Benzoic acid (C 6 H 5 COOH (s))
extracted by precipitation from the water phase, including hydrochloric acid and subsequent filtration. Recrystallized precipitate weighs 6.36 grams. Write the reaction formula and calculate the yield

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