PART I. MAKING A SOLUTION OF COPPER NITRATE I. 1. OXIDATION NUMBERS In Part A of the experimental procedure, copper metal is added to concentrated nitric acid. The reaction between copper metal and concentrated nitric acid is an oxidation-reduction reaction that is somewhat complicated. 4 HNO3(aq) + Cu (s) → Cu(NO3)2 (aq) + 2 H₂O (1) + 2 NO₂ (g) Consider the balanced chemical reaction given above. Assign the oxidation numbers to each atom in the equation. Cu: H: O: N: 4 HNO3(aq) 2 2 2 + Cu(s) 2 → Cu(NO3)2 (aq) 2 2 2 + 2 H₂O (1) 2 + 2 NO₂ (g) 2 2

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.