Here's the breakdown:
The Reaction:
Hydrogen peroxide acts as an oxidizing agent, and copper can be oxidized to copper(II) ions (Cu²⁺). This reaction produces water (H₂O) and copper(II) oxide (CuO).
The Balanced Equation:
H₂O₂ + Cu → CuO + H₂O
Balancing the Equation:
* Oxygen: There are 2 oxygen atoms on the left side and 2 on the right side.
* Hydrogen: There are 2 hydrogen atoms on the left side and 2 on the right side.
* Copper: There is 1 copper atom on each side.
Since all atoms are balanced, the equation is already balanced.
Important Note: This reaction is slow at room temperature. It can be catalyzed by adding something like a small amount of acid or a transition metal catalyst.