acidic salt is made up of strong acid and weak base whereas normal salt is made up of strong acid and strong base or weak acid and weak base. acidic salt ionises into form H+ions more than OH- ions in water solution but normal salt ionises to form equal number if H+ ions and OH- ions in water solution.
MgCl2
Charges are not included in chemical formulas- they are implied
Walking is what i think you are talking about