2Ce(IO3)4(aq) + 24H2C2O4(aq)→Ce2(C2O4)3(aq) + 4I2(aq) + 42CO2(g) + 24H2O(l)

What would it look like if Increase the concentration of carbon dioxide.

If the concentration of carbon dioxide is increased in the reaction, there will be more CO2(g) produced as a product. The amount of Ce2(C2O4)3(aq), I2(aq), and H2O(l) produced as products will remain the same. However, the reaction may shift to favor the production of more CO2(g) to reach a new equilibrium.