Final answer:
The correct balanced equation for the given double-displacement reaction is cocl2(aq) + 2na2co3(aq) → 2nacl(aq) + co2(g) + na2co3(aq).
Step-by-step explanation:
In the given double-displacement chemical reaction, cocl2(aq) + 2na2co3(aq), the correct balanced equation for the reaction is option C. cocl2(aq) + 2na2co3(aq) → 2nacl(aq) + co2(g) + na2co3(aq). This reaction involves the exchange of ions between the two reactants, resulting in the formation of two products, 2nacl(aq) and co2(g), along with the remaining reactant, na2co3(aq).