Respuesta :
Answer:
The answer is +2 to 0
Explanation:
I don't know why that is the answer but that's what the answer was on the same question on a quiz I just took so I hope this helps.
The oxidation number of copper changes from +2 to 0 in the given reaction.
What is oxidation state?
Oxidation state of any element tells about the gain or losses of the no. of electrons from that element.
Given chemical reaction is:
3CuCl₂(aq) + 2Al(s) → 3Cu(s) + 2AlCl₃(aq)
On the left side of the reaction, copper is in the +2 oxidation state because oxidation state of chlorine is -1. And on the right side of the reaction, copper is in zero oxidation state as it is present with no charge.
Hence, oxidation state of copper changes from +2 to 0.
To know more about oxidation state, visit the below link:
https://brainly.com/question/6498977
