Addition of sodium chloride solution to potassium chloride solution

Addition of trioxonitrate (V) acid (nitric acid) to distilled water

Addition of trioxonitrate (V) acid (nitric acid) to tetraoxosulphate (IV) acid (sulphuric acid)

Addition of trioxonitrate (V) acid (nitric acid) to potassium trioxonitrate (V) (potassium nitrate) solution

Addition of trioxonitrate (V) acid (nitric acid) to potassium hydroxide solution