81. Solving a chemistry problem

7 test

1. What processes occur on carbon electrodes during the electrolysis of an aqueous solution of copper chloride (II) CuCl2?
2. What metal can be obtained by electrolysis of aqueous solutions of its compounds?
3. From what salt can oxygen be obtained by electrolysis of its aqueous solution?
4. During the electrolysis of an aqueous solution of which salt, the following processes occur:
2H2O 2e- = H2 ↑ 2 OH- , 2 Cl- – 2e- = Cl20

5. During the electrolysis of an aqueous solution of which salt should one expect the release of free metal on a carbon cathode?