Mg(s) + 2HCl(aq) → MgCl 2 (aq) + H 2 (g) To Conduct Demonstration Lift the balloons one at a time so that the Mg falls into the HCl in each flask. Swirl to speed up reaction. Make sure all the Mg is ...

If necessary, protect non-glass surfaces of an overhead projector with clear plastic. Dip one Q-tip into concentrated hydrochloric acid (HCl) and a second cotton swab into concentrated aqueous ammonia ...