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I could not find any instances of benzenehexol reduction in the literature, but a great number of synthetic protocols exist for the reduction of phenols. Here is a simple one that appears quite general: it uses LiAlH4 and KOtBu in toluene to conduct reductive cleavage of phenols and phenolic ethers to generate arenes. The authors only tested this with ...

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As @Poutnik has answered, heating manganese oxides at elevated temperature results in forming of $\ce{Mn3O4}$, research paper suggest that the reaction gets affected not only temperature but the partial pressure of oxygen and further heating at 1400 °C results in formation of $\ce{MnO}$. Here is an excerpt from a research paper [1] (emphasis mine): TG and ...

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You may need a good lab oven. Manganese(II,III) oxide on Wikipedia Preparation $\ce{Mn3O4}$ formed when any manganese oxide is heated in air above 1000 °C. Considerable research has centred on producing nanocrystalline $\ce{Mn3O4}$ and various syntheses that involve oxidation of $\ce{Mn^{II}}$ or reduction of $\ce{Mn^{VI}}.$

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Displacement reaction of copper by sodium will work well if ethanol is used to precipitate the sodium sulfate. Copper chloride is soluble in ethanol (>50 g/100 mL) while sodium sulfate is not. A mixture of concentrated salts in water, followed by dilution with fair amounts of ethanol will allow recovery of high-purity copper chloride dihydrate after proper ...

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Unless you worked to Pharma industry Good Manufacturing Practice you shouldn't trust your product The simple reason why you should not trust the product is that that you don't know it is safe unless you have followed rigorous quality control processes. The drug industry follows carefully regulated quality-control processes known, in Europe, as Good ...

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I'm guessing this is a homework type question. Yet, I have some concern of this being a exam question, probably one already taken. So I give a step by step answer depicted in following diagram (courtesy of https://web.chemdoodle.com/demos/sketcher/):

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