Question

MATERIALS: cene nitric acid, HNO, 3.0M sodium hydroxide, NaOH 6.0 M sulfuric acid, H2SO4 zine metal DI water PROCEDURE: Make sure you record detailed observations after almost every step. You will also need to write the balanced chemical equations for almost every step. Make sure you answer any questions associated with a step 1. Weigh approximately 0.5 g of copper metal and record the weight. Place the copper in a 250 mL beaker. 2. IN THE HOOD add 4-5 mL of conc. nitric acid (HNO3) to the beaker. BE VERY CAREFUL. This reaction generates a toxic gas. Make sure the reaction is complete before removing the beaker from the ſume hood. Describe the reaction in detail as to color change, evolution of gas and any temperature change. After the reaction is complete, add 100 ml distilled water. Observations: A brown gas appeared after combining and the solution turned green. Once watu was added, the liguld turned due Balance the equation for the reaction observed: | Cu(s) + 4HNO3(aq) → | Cu(NO)(aq) + 2_NO_(g)+ H:01) 3. Add 40 ml of 3.0 M NaOH (sodium hydroxide) to the solution in your beaker, Observations: double replacemiatt mi soluble the liquid turned dark blue and got gel-like - Cu(NO3)2(aq) + 2NaOH tag) - Culot) (5) NA NO) Write the balanced equation for the reaction observed:

I really just need all the equations, please and thank you.

Answer 1

3. Cu(NO₃)₂ + 2NaOH = Cu(OH)₂ + 2NaNO₃

4. Decomposition of Cu(NO₃)₂: 2 Cu(NO₃)₂ = 2 CuO + 4 NO₂ + O₂

6. Reaction of CuO with sulfuric acid: CuO + H₂SO₄ = CuSO₄ + H₂O

7. Reaction for displacement of Cu2+ by Zn: Zn(s) + CuSO₄(aq) = Cu(s) + ZnSO₄ (aq).

Reaction for evolution of gas: Zn(s) + H₂SO₄ = H₂(g) + ZnSO₄ (aq). This is because of residual unreacted H₂SO₄ that remains in solution after formation of CuSO₄ is completed.