13. Solving a chemistry problem

147. Being one of the most biologically active trace elements, copper is included in a number of oxidative enzymes and takes second place after iron as a catalyst for redox processes. In plants, copper is involved in the processes of photosynthesis, the synthesis of proteins, and in the formation of chlorophyll.
• Complete the reaction equations characterizing the properties of copper compounds. For redox reactions, give electronic equations, indicate the oxidizing agent, reducing agent, processes: oxidation, reduction:
CuCl2 Cu → …
CuSO4KI → Cu2I2 I2 ….