Question

What is the net ionic equation for formation of an aqueous solution of `NiI_2` accompanied by evolution of `CO_2` gas and water via mixing solid `NiCO_3` and aqueous hydriodic acid?

Answer 1

`CO_3^(2-) + 2H_3O^+ rarr CO_2(g)uarr + 3H_2O(l)`

Explanation:

Or

`CO_3^(2-) + 2H^+ rarrCO_2(g)uarr + H_2O(l)`

The iodide and nickel ions are just along for the ride.........