When copper (ii) sulphate solution is treated with excess ammonium hydroxide, a precipitate is first formed, and then this dissolves to give a deep blue solution.

This deep blue solution is a?

  • A Cu(OH)2
  • B CuSo4.5H2O
  • C (NH4)2SO4
  • D Cu(NH3)4(OH)2
  • E CuSO4.(NH4)2SO4.2H2O
jamb 1980chemistry

The correct answer is E. CuSO4.(NH4)2SO4.2H2O

[Cu(NH\(_3\) 2](OH)\(_2\) is the formed complex.

 [Cu(NH3)4]SO4: Tetraamminecopper(II) sulfate

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