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Which of the following is not observed when aluminium is added to a solution of copper sulphate?
- a)Final solution is light green.
- b)Solution is blue in the beginning.
- c)The brown mass is deposited on aluminium.
- d)Final solution is colourless.
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
Which of the following is not observed when aluminium is added to a so...
When aluminum is added to copper sulphate solution, displacement reaction takes place. This means , aluminum being more reactive than copper..displaces it from its salt solution. ... The colour of the solution will change from blue to transparent and copper will be observed as a layer on the Aluminium piece.
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Most Upvoted Answer
Which of the following is not observed when aluminium is added to a so...
In the activity series aluminium is more reactive than copper then aluminium displace copper
cuSo4+al------------)al2 (so4)3+cu
in starting the colour of copper sulphate is blue in colour but after displacement it turns colourless
and the red colour of copper deposite at the aluminium strip
so
the final solution is colourless not light green
cuSo4+al------------)al2 (so4)3+cu
in starting the colour of copper sulphate is blue in colour but after displacement it turns colourless
and the red colour of copper deposite at the aluminium strip
so
the final solution is colourless not light green
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Which of the following is not observed when aluminium is added to a so...
Explanation:
When aluminium is added to a solution of copper sulphate, a displacement reaction takes place. This reaction can be represented by the following equation:
2Al + 3CuSO4 → Al2(SO4)3 + 3Cu
Here, aluminium (Al) reacts with copper sulphate (CuSO4) to form aluminium sulphate (Al2(SO4)3) and copper (Cu).
Observations:
a) Final solution is light green: This observation is incorrect. The final solution obtained after the reaction is complete is colorless. This is because aluminium sulphate is a white solid and does not dissolve in water, resulting in a colorless solution.
b) Solution is blue in the beginning: This observation is correct. Copper sulphate solution is blue in color. When aluminium is added to the solution, a displacement reaction occurs, resulting in the formation of copper. The blue color of the solution is due to the presence of copper ions (Cu2+) in the copper sulphate solution.
c) The brown mass is deposited on aluminium: This observation is also correct. When aluminium reacts with copper sulphate, copper is displaced from the solution and deposited onto the surface of aluminium. The brown mass observed is the copper that has been displaced from the copper sulphate solution.
d) Final solution is colorless: This observation is correct. As mentioned earlier, aluminium sulphate is a white solid and does not dissolve in water. Therefore, the final solution obtained after the reaction is complete is colorless.
Conclusion:
From the given options, option 'a' is not observed when aluminium is added to a solution of copper sulphate. The final solution obtained after the reaction is complete is colorless, not light green.
When aluminium is added to a solution of copper sulphate, a displacement reaction takes place. This reaction can be represented by the following equation:
2Al + 3CuSO4 → Al2(SO4)3 + 3Cu
Here, aluminium (Al) reacts with copper sulphate (CuSO4) to form aluminium sulphate (Al2(SO4)3) and copper (Cu).
Observations:
a) Final solution is light green: This observation is incorrect. The final solution obtained after the reaction is complete is colorless. This is because aluminium sulphate is a white solid and does not dissolve in water, resulting in a colorless solution.
b) Solution is blue in the beginning: This observation is correct. Copper sulphate solution is blue in color. When aluminium is added to the solution, a displacement reaction occurs, resulting in the formation of copper. The blue color of the solution is due to the presence of copper ions (Cu2+) in the copper sulphate solution.
c) The brown mass is deposited on aluminium: This observation is also correct. When aluminium reacts with copper sulphate, copper is displaced from the solution and deposited onto the surface of aluminium. The brown mass observed is the copper that has been displaced from the copper sulphate solution.
d) Final solution is colorless: This observation is correct. As mentioned earlier, aluminium sulphate is a white solid and does not dissolve in water. Therefore, the final solution obtained after the reaction is complete is colorless.
Conclusion:
From the given options, option 'a' is not observed when aluminium is added to a solution of copper sulphate. The final solution obtained after the reaction is complete is colorless, not light green.
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Which of the following is not observed when aluminium is added to a solution of copper sulphate?a)Final solution is light green.b)Solution is blue in the beginning.c)The brown mass is deposited on aluminium.d)Final solution is colourless.Correct answer is option 'A'. Can you explain this answer?
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