1. Color Change: The blue solution of copper sulfate will turn a cloudy, greenish-gray color as the copper ions (Cu²⁺) are displaced from the solution by the magnesium. This is because magnesium forms a colorless solution when it reacts with sulfate ions (SO₄²⁻).
2. Solid Formation: A reddish-brown solid will form on the surface of the magnesium metal. This is elemental copper, which is released from the solution as the copper ions are replaced. You can see this as a coating on the magnesium or potentially as a sediment settling at the bottom of the container.
3. Heat Generation: The reaction is exothermic, meaning it releases heat. You might feel the container warming up slightly, particularly if you are using a significant amount of magnesium.
The Chemical Reaction:
The chemical reaction that occurs is a single displacement reaction:
Mg(s) + CuSO₄(aq) → MgSO₄(aq) + Cu(s)
Important Note: When conducting this experiment, it's crucial to handle the chemicals with care and ensure proper safety precautions.
