What are the following reactions? Redox, acid base, or precipitate? A:Cu (s) + 2 NO3− (aq) + 4 H+ (aq) + 4 H2O (l) →  [Cu(H2O)6]2+ (aq) + 2 NO2 (g) B:  [Cu(H2O)6]2+ (aq) + 2 OH- (aq) → Cu(OH)2 (s) + 6 H2O (l) C:  Cu(OH)2 (s) → CuO (s) + H2O (l) D:  CuO (s) + 2 H+ (aq) + 5 H2O (l) → [Cu(H2O)6]2+ (aq) E:  [Cu(H2O)6]2+ (aq) + Zn (s) → Cu (s) + Zn2+ (aq) + 6 H2O (l)  

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Redox or reduction-oxidation reactions refer to those where there is a transfer of electrons from one substance to the another. The substance losing electrons is being oxidized and the one gaining electrons is being reduced. In an acid base reaction water is one of the end products. A precipitation reaction leads to the formation of a product...

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