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प्रश्न
When aqueous ammonia is added to CuSO4 solution, the solution turns deep blue due to the formation of tetramminecopper (II) complex, \[\ce{[Cu(H2O)6]^{2+}_{( aq)} + 4NH3_{( aq)} ⇌ [Cu(NH3)4]^{2+}_{( aq)}}\], among HO2 and NH3 Which is stronger Lewis base.
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उत्तर
- \[\ce{[Cu(H2O)6]^{2+}_{( aq)} + 4NH3_{( aq)} ⇌ [Cu(NH3)4]^{2+}_{( aq)} + H2}\]
- Nitrogen less electronegative than oxygen and donates its lone pair of electrons readily. Hence NH3 is a stronger Lewis base.
- If a better Lewis base (ligand) is available, a Lewis acid (central metal ion) will react (Ligand exchange reaction)
- In this reaction, H2O is exchanged with NH3.
- The Lewis acid Cu2+ exchanges the Lewis base H with better Lewis base N-H3 to form [Cu(NH3)4]2+
- Hence NH3 is a stronger Lewis base than H2O in this reaction.
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संबंधित प्रश्न
For a reaction \[\ce{HCl_{(aq)} + H2O_{(l)} ⇌ H3O^+_{ (aq)} + Cl^-_{ (aq)}}\]
Which of the following is a conjugate acid-base pair?
The theory which explain amphoteric nature of water is ______.
Classify the following species into Lewis acids and Lewis bases.
| Cl- | |
| `"NH"_4^+` | |
| BCl3 | |
| NH3 |
Identify the CORRECT statement.
Which of these is not likely to act as Lewis base?
Discuss the Lowry – Bronsted concept of acids and bases.
Omeoprazole and lansoprazole are used as ______.
Identify the conjugate acid - base pair in the following reaction.
\[\ce{H2O + HCl -> H3O+ + Cl-}\]
The species which will behave both as conjugate acid and conjugate base is ______.
According to Lowry-Bronsted concept, base is a substance which acts as ______.
