Question:

$CuSO _{4}$ dissolves in $NH _{3}$ due to the formation of

Updated On: Jul 2, 2022
  • $Cu ( OH )_{2}$
  • $Cu \left[\left( NH _{3}\right)_{4}\right] SO _{4}$
  • $Cu \left[\left( NH _{3}\right)_{4}( OH )_{2}\right]$
  • $CuO$
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The Correct Option is B

Solution and Explanation

$ {NH3 + H2O -> NH4OH}$ $ {CuSO4 + 2NH4OH -> Cu(OH)2 + (NH4 )2 SO4}$ $ {Cu(OH)2 + 2NH4 OH + (NH4)2SO4 -> [Cu(NH3)4] SO4 + 4H 2O}$ Tetraamminecupric sulphate
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Questions Asked in AIIMS exam

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Concepts Used:

Coordination Compounds

A coordination compound holds a central metal atom or ion surrounded by various oppositely charged ions or neutral molecules. These molecules or ions are re-bonded to the metal atom or ion by a coordinate bond.

Coordination entity:

A coordination entity composes of a central metal atom or ion bonded to a fixed number of ions or molecules.

Ligands:

A molecule, ion, or group which is bonded to the metal atom or ion in a complex or coordination compound by a coordinate bond is commonly called a ligand. It may be either neutral, positively, or negatively charged.