Which is the most reactive among copper, gold, iron, and silver? and why

 

Which is the most reactive among copper, gold, iron, and silver? and why

Iron is the most reactive among copper, gold, iron, and silver.

The reactivity of metals is often determined by their ability to undergo chemical reactions, particularly with substances like acids or oxygen. In the case of copper, gold, iron, and silver, iron is the most reactive, and here's a detailed explanation:

1. Iron (Fe):

• Reactivity: Iron is more reactive because it readily undergoes oxidation reactions.
• Explanation: Iron has a tendency to react with oxygen in the presence of moisture, leading to the formation of iron oxide, commonly known as rust. This reaction is represented as 4Fe + 3O2 → 2Fe2O3. The formation of rust is an indication of iron's susceptibility to corrosion and its relatively higher reactivity compared to copper, silver, and gold.

2. Copper (Cu):

• Reactivity: Copper is less reactive compared to iron.
• Explanation: Copper exhibits a lower reactivity because it does not readily react with oxygen to form oxides under normal conditions. While copper can corrode over time, the process is slower than that of iron. Copper is often used for its corrosion resistance, making it suitable for various applications, such as electrical wiring and plumbing.

3. Silver (Ag):

• Reactivity: Silver is generally unreactive.
• Explanation: Silver is known for its inertness under normal conditions. It does not easily react with oxygen or common acids. This property makes silver highly resistant to corrosion, and it is often used in jewelry and other applications where its luster and resistance to tarnish are valuable.

4. Gold (Au):

• 
  Reactivity: Gold is one of the least reactive metals. Explanation: Gold is renowned for its inert nature. It does not tarnish, corrode, or react with common acids. Gold's lack of reactivity is one reason why it has been valued throughout history for making jewelry and coins. Its resistance to corrosion makes it highly durable and attractive for various decorative and monetary purposes.

In summary, the reactivity order among copper, gold, iron, and silver is determined by their susceptibility to oxidation reactions. Iron is the most reactive, followed by copper, while silver and gold are relatively unreactive, with gold being one of the least reactive metals.