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Copper sulphate dissolves in excess KCN to give a)CuCN b)[Cu(CN)4]3- c)[Cu(CN)4]2- 4)Cu(CN)2?
Most Upvoted Answer
Copper sulphate dissolves in excess KCN to give a)CuCN b)[Cu(CN)4]3- c...
When copper sulphate (CuSO4) is dissolved in excess potassium cyanide (KCN), a complex ion is formed in a stepwise manner.
Step 1:
The first reaction occurs between copper sulphate and potassium cyanide to form copper cyanide (CuCN) and potassium sulphate (K2SO4).
CuSO4 + 2KCN → CuCN + K2SO4
Step 2:
In the presence of excess KCN, the CuCN reacts with it to form a complex ion, [Cu(CN)2]-.
CuCN + KCN → [Cu(CN)2]-
Step 3:
Further addition of KCN to the reaction mixture leads to the formation of a tetra-cyanocuprate(II) complex ion, [Cu(CN)4]2-.
[Cu(CN)2]- + 2KCN → [Cu(CN)4]2- + 2K+
Step 4:
If more KCN is added, the tetra-cyanocuprate(II) complex ion reacts with it to form the tricyanocuprate(III) complex ion, [Cu(CN)4]3-.
[Cu(CN)4]2- + KCN → [Cu(CN)4]3- + K+
Final Answer:
Thus, the final product obtained when copper sulphate is dissolved in excess KCN is the tricyanocuprate(III) complex ion, [Cu(CN)4]3-.
Hence, the correct option is (b) [Cu(CN)4]3-.
Community Answer
Copper sulphate dissolves in excess KCN to give a)CuCN b)[Cu(CN)4]3- c...
Option b....
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Copper sulphate dissolves in excess KCN to give a)CuCN b)[Cu(CN)4]3- c)[Cu(CN)4]2- 4)Cu(CN)2?
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Copper sulphate dissolves in excess KCN to give a)CuCN b)[Cu(CN)4]3- c)[Cu(CN)4]2- 4)Cu(CN)2? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Copper sulphate dissolves in excess KCN to give a)CuCN b)[Cu(CN)4]3- c)[Cu(CN)4]2- 4)Cu(CN)2? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Copper sulphate dissolves in excess KCN to give a)CuCN b)[Cu(CN)4]3- c)[Cu(CN)4]2- 4)Cu(CN)2?.
Copper sulphate dissolves in excess KCN to give a)CuCN b)[Cu(CN)4]3- c)[Cu(CN)4]2- 4)Cu(CN)2? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Copper sulphate dissolves in excess KCN to give a)CuCN b)[Cu(CN)4]3- c)[Cu(CN)4]2- 4)Cu(CN)2? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Copper sulphate dissolves in excess KCN to give a)CuCN b)[Cu(CN)4]3- c)[Cu(CN)4]2- 4)Cu(CN)2?.
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