Ammonia forms the complex ion [Cu(NH3)4]2+ with copper ions in alkaline solution but not in acidic solution. The probable reason for this is

Question

Ammonia forms the complex ion [Cu(NH3)4]2+ with copper ions in alkaline solution but not in acidic solution. The probable reason for this is (A) In acidic solution hydration protects Cu2+ ion (B) In acidic solution proton coordinates withammonia molecules to form NH+4 ions and NH3 molecules are not available (C) In alkaline solutions insoluble Cu(OH)2 is precipirated which is soluble in excess of any alkali (D) Copper hydroxide is amphoteric substance

Tardigrade Admin · Accepted Answer

In acidic solution proton coordinates with ammonia molecules to form NH+4 ions and NH3 molecules are not available for complex formation

Q. Ammonia forms the complex ion $[C u (N H_{3})_{4}]^{2 +}$ with copper ions in alkaline solution but not in acidic solution. The probable reason for this is

In acidic solution hydration protects $C u^{2 +}$ ion

In acidic solution proton coordinates withammonia molecules to form $N H_{4}^{+}$ ions and $N H_{3}$ molecules are not available

In alkaline solutions insoluble $C u (O H)_{2}$ is precipirated which is soluble in excess of any alkali

Copper hydroxide is amphoteric substance

In acidic solution proton coordinates with ammonia molecules to form $N H_{4}^{+}$ ions and $N H_{3}$ molecules are not available for complex formation

Q. Ammonia forms the complex ion [Cu(NH3​)4​]2+ with copper ions in alkaline solution but not in acidic solution. The probable reason for this is

In acidic solution hydration protects Cu2+ ion

In acidic solution proton coordinates withammonia molecules to form NH4+​ ions and NH3​ molecules are not available

In alkaline solutions insoluble Cu(OH)2​ is precipirated which is soluble in excess of any alkali