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- what is the purpose of addition of acid during the reactionExplain the steps to convert the Cr6+ oxidant to a Cr4+ product ?This is a reduction reaction. Two hydrogens and two electrons are used to reduce the ketone to an alcohol. Draw out the structures of NaBD4 and EtOH. What is their role in this reaction? Draw the product of the reaction. What advantage is there to using these reducing agents instead of hydrogenation reagents (H2, metal catalyst)?