The equation Cu + 2K2Cr2O7 + 4H2SO4 -> CuSO4 + 2Cr2(SO4)3 + K2SO4 + 4H2O.

1. Detailed information on the chemical equation Cu + 2K₂Cr₂O₇ + 4H₂SO₄ -> CuSO₄ + 2Cr₂(SO₄)₃ + K₂SO₄ + 4H₂O:

This is a chemical equation describing the reaction process between copper (Cu), potassium dichromate (K₂Cr₂O₇) and sulfuric acid (H₂SO₄) to form copper sulfate (CuSO₄), chromium sulfate (Cr₂(SO₄)₃), potassium sulfate (K₂SO₄) and water (H₂O).

2. Reaction conditions:

This reaction requires the presence of a strong acid (in this case, H₂SO₄) and a sufficiently high temperature to initiate the reaction.

3. Reaction process:

During the reaction process, copper interacts with potassium dichromate and sulfuric acid, leading to the change in the position of ions among the chemicals, forming new products.

4. Phenomena occur:

When the reaction takes place, one can observe the color change of the solution from the orange of potassium dichromate to the blue of copper sulfate. Simultaneously, heat will be released during the reaction process.