Displacement of Hydrogen from Acid by Magnesium

Mg + 2HCl → MgCl2 + H2

Übersicht

Magnesium is oxidized from Mg⁰ to Mg²⁺ while hydrogen ions are reduced from H⁺ to H₂. This vigorous redox reaction produces rapid hydrogen evolution and significant heat. The reaction rate can be studied by varying acid concentration, temperature, or magnesium surface area.

Teilnehmer

Rolle Substanz Koeffizient Zustand
Reaktant Magnesium Mg 1 (s)
Reaktant Hydrochloric Acid HCl 2 (aq)
Produkt Hydrogen H 1 (g)

Alltägliches Beispiel

This reaction is commonly used in school chemistry labs to study reaction kinetics by measuring the rate of hydrogen gas evolution.

Industrielle Bedeutung

Understanding metal-acid redox reactions is fundamental to corrosion science, electrochemistry, and metallurgical processing.

Eigenschaften

Typ
Redox
Reversibel
Nein
Energie
Exotherm
ΔH
-462,0 kJ/mol

Verwandte Reaktionen

Bleaching with Sodium Hypochlorite Copper Reduction of Silver Ion Aqua Regia Dissolving Gold Cerium(IV) Reduction by Iron(II) Chlorine Oxidation of Bromide Copper Oxidation by Nitric Acid Hypochlorite Oxidation of Hydrogen Peroxide Hydrogen Peroxide as Oxidizing Agent (Acidic) Zinc Reduction of Silver Ion Iron(II) to Iron(III) Oxidation by Oxygen

Frequently Asked Questions

What is the equation for Displacement of Hydrogen from Acid by Magnesium?
The balanced equation is: Mg + 2HCl → MgCl₂ + H₂.
What type of reaction is Displacement of Hydrogen from Acid by Magnesium?
Displacement of Hydrogen from Acid by Magnesium is a redox reaction.
Is Displacement of Hydrogen from Acid by Magnesium exothermic or endothermic?
Displacement of Hydrogen from Acid by Magnesium is exothermic (releases energy). The enthalpy change (ΔH) is -462.0 kJ/mol.