A teacher combined CuCl2 (aq) and Na (s). The student observed a color change, thus a reaction occurred. Assign oxidation numbers to the reactants and products in the net ionic equation. Which reactant, CuCl2 (aq) or Na (s), got oxidized? Which reactant, CuCl2 (aq) or Na (s), got reduced?  Which reactant, CuCl2 (aq) or Na (s), is the oxidizing agent? Which reactant, CuCl2 (aq) or  Na (s), is the reducing agent?

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