Final answer:
In the reaction between CuCl2(aq) and Na2CO3(aq), the precipitation reaction yields CuCO3(s) as the precipitate with Na+ and Cl- remaining in solution.
Step-by-step explanation:
The precipitation reaction that occurs when CuCl2(aq) and Na2CO3(aq) are mixed involves the formation of a solid precipitate from two aqueous solutions. According to the solubility rules, carbonates are generally insoluble except for those of potassium, sodium, and ammonium. Therefore, when these two solutions are mixed, CuCO3(s) is formed as an insoluble precipitate while the sodium and chloride ions remain in solution since sodium chloride is soluble. The balanced chemical equation for this reaction is:
2Na+(aq) + CO32-(aq) + Cu2+(aq) + 2Cl-(aq) → CuCO3(s) + 2Na+(aq) + 2Cl-(aq)
This reaction is an example of a double-replacement reaction where the cations and anions in the reacting solutions exchange partners, and one of the new combinations is insoluble, leading to the precipitation of CuCO3.