Name a substance that when dissolved in water contains

(i) only ions

(ii) ions and molecules.

• When any atom or group of atoms lose or gain the electron to get charges is called ions.
• When two or more atoms combine with a molecular bond then that is called molecules.

(i) Common salt named sodium chloride (NaCl) contains only ions when dissolved in water.

(ii) Acetic acid has ions and molecules both when mixed with water.