Molecular Equation:
2 HBr(aq) + Mg(s) → MgBr₂(aq) + H₂(g)
Net Ionic Equation:
2 H⁺(aq) + Mg(s) → Mg²⁺(aq) + H₂(g)
Explanation:
* Molecular Equation: This equation shows the complete chemical formulas of all reactants and products.
* Net Ionic Equation: This equation shows only the species that directly participate in the reaction. We omit spectator ions, which are ions that exist in the same form on both sides of the equation. In this case, Br⁻ is a spectator ion.
Breakdown of the reaction:
* Reactants: Hydrobromic acid (HBr) is a strong acid, meaning it completely ionizes in solution to form H⁺ and Br⁻ ions. Magnesium (Mg) is a solid metal.
* Products: Magnesium bromide (MgBr₂) is a soluble ionic compound that forms in solution. Hydrogen gas (H₂) is a product of the reaction and is released as bubbles.
Key Points:
* This is a single displacement reaction, where magnesium displaces hydrogen from the acid.
* The reaction is exothermic, meaning it releases heat.
* The hydrogen gas produced is flammable, so the reaction should be conducted in a well-ventilated area.
