"What ions", strictly--they're salts, so they dissociate when they dissolve. But it's conventional to look at the breakdown by element, not by ion, even in case

"What ions", strictly--they're salts, so they dissociate when they dissolve. But it's conventional to look at the breakdown by element, not by ion, even in cases where the specific ion is important. For example, fertilizers give "percent nitrogen from nitrate" and "percent nitrogen from ammonium", not "percent nitrate" or "percent ammonium".