Ammonia reacts with copper ions in a basic me | vedclass

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Question

(B) In an acidic medium,the concentration of $H^+$ ions is high. Ammonia $(NH_3)$ is a Lewis base and reacts with $H^+$ ions to form ammonium ions $(N

Vedclass · Accepted Answer

Because in an acidic solution,ammonia molecules accept protons to form $NH_4^+$ ions.

Vedclass · Answer

(B) In an acidic medium,the concentration of $H^+$ ions is high. Ammonia $(NH_3)$ is a Lewis base and reacts with $H^+$ ions to form ammonium ions $(NH_4^+)$ according to the reaction: $NH_3 + H^+ \rightarrow NH_4^+$. Since the lone pair of electrons on nitrogen is now involved in the formation of the $NH_4^+$ ion,it is no longer available to donate to the $Cu^{2+}$ ion to form the coordinate covalent bond required for the complex $[Cu(NH_3)_4]^{2+}$. Therefore,the complex does not form in an acidic medium.

Ammonia reacts with copper ions in a basic medium to form the complex ion $[Cu(NH_3)_4]^{2+}$,but it does not form this complex ion in an acidic solution. Why?

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