When you balance equations, do you treat polyatomic ions as one unit or treat the different elements in the ion separately? Because if you treat them as one unit, then what if the elements get separated in the products side of the equation?

Question

Anne · Accepted Answer

You have to make sure that each ELEMENT has the same number of atoms on each side of the equation. so treat polyatomics like they are separate elements. if you have say, SO4 on one side, you have to make sure that there are 4 oxygen atoms and one sulfur atom on the other side too, regardless of if they are together or not. does that help?

DrBob222 · Answer

Let me expand a little on the very good answer Anne gave. I do it BOTH ways. IF the polyatomic ion stays intact, it is much easier and quicker to check everything as units. However, if they are separated, as you note in some instances, you are left with no choice but to balance individual elements as Anne has indicated. .