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UPSC Combined Geo-Scientist

Chemist

  • 3 descriptive papers
  • 200 marks each
  • 3 h per paper

Mains Paper I covers inorganic chemistry.

UPSC Combined Geo-Scientist, Mains · 2022 · Mains Paper I

Q8(b). Stepwise formation of diamminesilver(I)

Question

Give the stepwise chemical equations and calculate the overall stability constant β₂ for the formation of [Ag(NH₃)₂]⁺ from [Ag(H₂O)₄]⁺. (Given: K₁ = 2.1 × 10³, K₂ = 8.2 × 10³.)

Answer in brief

β₂ = K₁K₂ = 1.722 × 10⁷ ≈ 1.7 × 10⁷. Two ammonia ligands replace the hydrated coordination environment.

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Coversstepwise stability constantoverall stability constant β2diamminesilver(I)[Ag(NH3)2]+

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