Displacement of Hydrogen from Acid by Magnesium

Mg + 2HCl → MgCl2 + H2

Tổng quan

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.

Người tham gia

Vai trò Chất Hệ số Trạng thái
Chất phản ứng Magnesium Mg 1 (s)
Chất phản ứng Hydrochloric Acid HCl 2 (aq)
Sản phẩm Hydrogen H 1 (g)

Ví dụ thực tế

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

Tầm quan trọng công nghiệp

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

Tính chất

Loại
Redox
Thuận nghịch
Không
Năng lượng
Tỏa nhiệt
ΔH
-462,0 kJ/mol

Phản ứng liên quan

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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.