The equation Cu + HgI2 -> CuI2 + Hg

1. Detailed information about the equation Cu + HgI₂ -> CuI₂ + Hg: This is a chemical reaction in which copper (Cu) reacts with mercury iodide (HgI₂) to form copper iodide (CuI₂) and mercury (Hg).

2. Reaction conditions: The specific conditions for this reaction may vary depending on factors such as temperature, pressure, and the presence of a catalyst. However, in general, this reaction takes place at normal temperature and atmospheric pressure.

3. Reaction process: In this reaction, copper (Cu) acts on mercury iodide (HgI₂), performing electron transfer to form copper iodide (CuI₂) and mercury (Hg). This chemical reaction is a type of substitution reaction.

4. Phenomena occurring: When the reaction occurs, a clear phenomenon that can be observed is the change in color due to the formation of copper iodide (CuI₂). However, another important phenomenon that cannot be directly observed but still occurs in this reaction is the movement of electrons from copper (Cu) to the iodine of HgI₂.

Note: The above equation is not balanced (Cu + HgI₂ -> CuI₂ + Hg). The balanced equation will be: Cu + 2HgI₂ -> 2CuI + Hg.