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Intensity of blue color increases gradually when _________________
- a)copper rod is dipped in silver nitrate solution
- b)silver rod is dipped in copper nitrate solution
- c)zinc rod is dipped in silver solution
- d)copper rod is dipped in zinc rod solution
Correct answer is option 'A'. Can you explain this answer?
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Intensity of blue color increases gradually when _________________a)co...
When a copper rod is dipped in silver nitrate solution, a redox reaction occurs between Copper and an aqueous solution of silver nitrate. So the intensity of the blue color increases gradually as silver deposits on the rod.
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Intensity of blue color increases gradually when _________________a)co...
Introduction
The phenomenon described in the question is related to the electrochemical reactions that occur when different metals are immersed in solutions of their respective salts. In this case, the blue color intensity increases when a copper rod is dipped in silver nitrate solution.
Electrochemical Reaction
- When a copper rod is immersed in a silver nitrate solution, a displacement reaction takes place.
- Copper (Cu) is more reactive than silver (Ag), leading to the reduction of silver ions (Ag⁺) to metallic silver while copper dissolves into the solution.
Color Change Mechanism
- The blue color of the silver nitrate solution is due to the presence of copper ions (Cu²⁺) in the solution when copper displaces silver.
- As copper ions are formed, the concentration of silver ions decreases, leading to the precipitation of metallic silver, which does not contribute to the blue color.
Increased Intensity of Blue Color
- As the reaction proceeds, the intensity of the blue color increases due to the formation of more copper ions in the solution.
- The increase in copper ion concentration leads to a more pronounced blue color as more copper ions are present compared to the remaining silver ions.
Conclusion
- Therefore, the correct answer is option (a): "copper rod is dipped in silver nitrate solution," which results in an increase in the intensity of the blue color due to the formation of copper ions and the displacement of silver ions.
This understanding is crucial for NEET aspirants as it relates to concepts of electrochemistry and colorimetry in chemical reactions.
The phenomenon described in the question is related to the electrochemical reactions that occur when different metals are immersed in solutions of their respective salts. In this case, the blue color intensity increases when a copper rod is dipped in silver nitrate solution.
Electrochemical Reaction
- When a copper rod is immersed in a silver nitrate solution, a displacement reaction takes place.
- Copper (Cu) is more reactive than silver (Ag), leading to the reduction of silver ions (Ag⁺) to metallic silver while copper dissolves into the solution.
Color Change Mechanism
- The blue color of the silver nitrate solution is due to the presence of copper ions (Cu²⁺) in the solution when copper displaces silver.
- As copper ions are formed, the concentration of silver ions decreases, leading to the precipitation of metallic silver, which does not contribute to the blue color.
Increased Intensity of Blue Color
- As the reaction proceeds, the intensity of the blue color increases due to the formation of more copper ions in the solution.
- The increase in copper ion concentration leads to a more pronounced blue color as more copper ions are present compared to the remaining silver ions.
Conclusion
- Therefore, the correct answer is option (a): "copper rod is dipped in silver nitrate solution," which results in an increase in the intensity of the blue color due to the formation of copper ions and the displacement of silver ions.
This understanding is crucial for NEET aspirants as it relates to concepts of electrochemistry and colorimetry in chemical reactions.
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Intensity of blue color increases gradually when _________________a)copper rod is dipped in silver nitrate solutionb)silver rod is dipped in copper nitrate solutionc)zinc rod is dipped in silver solutiond)copper rod is dipped in zinc rod solutionCorrect answer is option 'A'. Can you explain this answer?
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