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.