* Formation of new substances: When copper sulfate and sodium carbonate react, they form new substances: copper carbonate (CuCO₃), sodium sulfate (Na₂SO₄), and water (H₂O).
* CuSO₄(aq) + Na₂CO₃(aq) → CuCO₃(s) + Na₂SO₄(aq) + H₂O(l)
* Color change: This reaction is visually evident as the blue solution of copper sulfate turns green due to the formation of copper carbonate, which is a green precipitate.
* Gas evolution: The reaction also releases carbon dioxide gas (CO₂).
These changes indicate a chemical reaction, where the original substances are transformed into new ones with different chemical compositions and properties.
