The Reaction:
* Magnesium (Mg) + Hydrochloric Acid (HCl) → Magnesium Chloride (MgCl₂) + Hydrogen Gas (H₂)
Explanation:
1. Displacement Reaction: This is a single displacement reaction. The more reactive magnesium metal displaces hydrogen from the hydrochloric acid.
2. Formation of Magnesium Chloride: Magnesium (Mg) combines with chlorine (Cl) from the hydrochloric acid to form magnesium chloride (MgCl₂), a salt.
3. Hydrogen Gas Release: The displaced hydrogen atoms combine to form hydrogen gas (H₂), which is released as bubbles.
Observations:
* Bubbles: You would observe vigorous bubbling as hydrogen gas is produced.
* Heat: The reaction is exothermic, meaning it releases heat, and the solution will become warm.
* Dissolving: The magnesium metal will gradually dissolve as it reacts with the acid.
Safety:
* Caution: This reaction is very exothermic and can be dangerous. It's important to handle hydrochloric acid with care and always wear appropriate safety equipment (gloves, goggles, etc.).
* Hydrogen Gas: Hydrogen gas is flammable. Avoid open flames or sparks near the reaction.
Summary:
The reaction between hydrochloric acid and magnesium is a classic example of a single displacement reaction. It produces magnesium chloride, hydrogen gas, and heat.
