Nitric Acid Experiment - Experiment title Nitric Acid...

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Experiment title: Nitric Acid Oxidation of Benzoin and Borohydride Reduction of a Ketone Reading: Bruice : 1 8.5. 20. 1 Goal of the experiment: Nitric Acid oxidation of benzoin to benzil and reduction of benzil to hydrobenzoin by sodium borohydride reduction. Experiment protocol: PUT ON YOUR SAFETY GLASSES, LABCOAT, AND GLOVES. This reaction is exothermic and involves concentrated nitric acid. Keep your safety equipment on at all; times. 1 ). Place 250mg benzoin in a 20mL sidearm test tube. Next, add 1 .OmL of \ concentrated nitric acid. 2). Clamp the tube at your station, turn on the water, and attach a vacuum hose to the aspir&tor. Connect the other end to the sidearm. 3). Heat the mixture in a 5 OmL beaker of boiling water on your hotplate for 10 minutes. 4). Add 2. OmL water to the mixture, cool to room temperature, and gently swirl the tube for two minutes to coagulate the precipitated yellow product. 5). Separate the crystals from the liquid by Hirsch funnel and wash them with 2mL of cold water while still in the funnel. Dry them on filter paper.
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