The chemical reaction $ ext{Fe}(s) + ext{CuSO}_4(aq) o ext{FeSO}_4(aq) + ext{Cu}(s) $ represents whic

Question

The chemical reaction $	ext{Fe}(s) + 	ext{CuSO}_4(aq) 	o 	ext{FeSO}_4(aq) + 	ext{Cu}(s) $ represents which type of reaction?

Examoogle · Accepted Answer

The correct answer is Option C: Displacement reaction. The chemical reaction $Fe(s) + CuSO_4(aq) \rightarrow FeSO_4(aq) + Cu(s)$ is a displacement reaction. In this process, a more reactive element, iron ($Fe$), displaces a less reactive element, copper ($Cu$), from its aqueous salt solution.

Step-by-Step Solution & Concepts:
The chemical reaction $Fe(s) + CuSO_4(aq) \rightarrow FeSO_4(aq) + Cu(s)$ is a displacement reaction. In this process, a more reactive element, iron ($Fe$), displaces a less reactive element, copper ($Cu$), from its aqueous salt solution.

Working Principle: This reaction occurs because iron is higher in the reactivity series than copper. When metallic iron is added to a blue-colored copper sulfate solution, iron atoms lose electrons to become $Fe^{2+}$ ions (oxidation), while copper ions $Cu^{2+}$ gain electrons to become metallic copper (reduction). This electron transfer process results in the color change of the solution from blue to light green.

Key Formulas: $Fe + CuSO_4 \rightarrow FeSO_4 + Cu$ — Chemical equation for the displacement reaction.

Key Points: Iron ($Fe$) acts as the reducing agent.; The copper sulfate solution changes from blue to light green as $FeSO_4$ forms.; Metallic copper is deposited on the iron surface.

Advantages: Used in metallurgical processes for extracting metals.; Helps in cleaning metal surfaces.

Applications: Extraction of metals from their ores.; Used in simple chemical laboratory experiments to demonstrate reactivity.

Additional Info: A displacement reaction is often synonymous with a single displacement reaction.. Option A (Combination): Two reactants combine to form one product (e.g., $C + O_2 \rightarrow CO_2$).. Option B (Combustion): Burning in the presence of oxygen, usually releasing energy.. Option D (Double Displacement): Two compounds exchange ions to form two new compounds.

Answer: C is correct — The reaction is a displacement reaction because iron replaces copper in the sulfate solution.

Exam Tip: Remember the reactivity series: K, Na, Ca, Mg, Al, Zn, Fe, Pb, H, Cu, Hg, Ag, Au. Elements higher up displace elements lower down.

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Option A: Combination reaction

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Option B: Combustion reaction

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Option D: Double Displacement reaction

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