Displacement of Hydrogen from Acid by Magnesium

Mg + 2HCl → MgCl2 + H2

Visão geral

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.

Participantes

Papel Substância Coeficiente Estado
Reagente Magnesium Mg 1 (s)
Reagente Hydrochloric Acid HCl 2 (aq)
Produto Hydrogen H 1 (g)

Exemplo do cotidiano

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

Importância industrial

Compreender as reações redox de metal com ácido é fundamental para a ciência da corrosão, a proteção galvânica e a produção de hidrogénio. O magnésio é utilizado como ânodo de sacrifício em estruturas metálicas.

Propriedades

Tipo
Redox
Reversível
Não
Energia
Exotérmico
ΔH
-462,0 kJ/mol

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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.