Question

Write the net ionic equation for each of the following reactions?

BaI2(aq) + K2SO4(aq) -> BaSO4(s) + 2 KI (aq)

K2CO3(aq) +2 HCl(aq) -> 2 KCl(aq) + CO2(g) + H2O(l)

Answer 1

The aquated ions are not considered in the net ionic equations. Only the materials that precipitate or are evolved as gases are of interest.

Explanation:

`Ba^(2+) + SO_4^(2-) rarr BaSO_4(s)darr` Barium sulfate is reasonably insoluble.

`CO_3^(2-) + 2H^+ rarr H_2O(l) + CO_2(g)uarr` The potassium salts are along for the ride, and need not be considered. Carbonate anion undergoes an acid base reaction, and liberates gaseous carbon dioxide.

In both instances, mass and charge have been conserved, as they must be.