This is the equation for the formation of magnesium chloride. mg(s) + 2hcl(l) → mgcl2(aq) + h2(g) which are the reactants and the products in this reaction? a. the reactants are mgcl2 (magnesium chloride) and hcl (hydrochloric acid); the products are mg (magnesium) and h2 (hydrogen). b. the reactants are mgcl2 (magnesium chloride) and h2 (hydrogen); the products are mg (magnesium) and hcl (hydrochloric acid). c. the reactants are mg (magnesium) and h2 (hydrogen); the products are mgcl2 (magnesium chloride) and hcl (hydrochloric acid). d. the reactants are mg (magnesium) and hcl (hydrochloric acid); the products are mgcl2 (magnesium chloride)and h2 (hydrogen).