2. The four-reaction copper cycle featured in this experiment is summarized belo

Question

2. The four-reaction copper cycle featured in this experiment is summarized below. Fill in the blanks to show the reagents that will be used in each step. Cu(s) CuCl (aq) Cu(NO,)2(aq) -Cu3(PO4)2(s) . The amount of copper obtained at the end of the experiment provides a good test of laboratory technique - each step must be carried out without losing any copper. In Part B, aqueous copper(II) nitrate will be converted to solid copper(II) phosphate, and the copper(II) phosphate precipitate will be removed by filtration. How will the liquid filtrate appear if any Cu fails to precipitate and remains dissolved in the filtrate as copper(II) nitrate?

Explanation / Answer

2. Reagents for the given transformation

Cu(s) + HNO3 (aq) ----> Cu(NO3)2 (aq)

Cu(NO3)2 (aq) + H3PO4 (aq) ---> Cu3(PO4)2 (s)

Cu3(PO4)2 + HCl (aq) ---> CuCl2 (aq)

CuCl2 (aq) + Ni (s) ---> Cu (s) + NiCl2 (aq)

The last step of the process is the reduction reaction

3. In part B, Cu3(PO4)2 (s) is formed from Cu(NO3)2 (aq), which is then filtered from the solution.

If during the process not all of Cu2+ is precipitated, the color of the filtrate would be greenish-blue due to dissolved Cu(NO3)2 in solution.

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.