Question

What is the balanced net ionic equation for `K_2SO_4(aq) + Cal_2(aq) -> CaSO_4(s) + KI(aq)`?

Answer 1

`Ca^(2+) + SO_4^(2-) rarr CaSO_4(s)darr`

Explanation:

The net ionic equation represents MACROSCOPIC chemical change, which is here the precipitation of (reasonably) insoluble `"calcium sulfate"`.

The potassium, and iodide ions are along for the ride, and remain is solution as aquated ions. And thus they are not included in the net ionic equation.