Balance the equation and write the products of this reaction. _Mg + _HCl -> _...... +_ ......

The products are a salt and hydrogen, MgCl₂ and H₂.The balanced equation is: Mg + 2HCl -> MgCl₂ + H₂This is a metal/acid reaction.Mg is a Group 2 metal, so there are two electrons in the outermost shell.Cl is a Group 7 element, so there are seven electrons in the outermost shell.So Mg donates one electron to each Cl atom to form one Mg²⁺ ion and two Cl^- ions (MgCl₂).Mg displaces the H in HCl to form MgCl₂ because Mg is more reactive than hydrogen, as shown on the reactivity series.