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BITSAT2021ChemistryIonic EquilibriumActual

The solubility of silver bromide in hypo solution involves the formation of:

Options

  1. AAg ₂ SO ₃
  2. BAg ₂ ~S ₂ O ₃
  3. CAg ⁺
  4. DNH ₄ ⁺

Correct answer

B. Ag ₂ ~S ₂ O ₃

Step-by-step solution

Hypo solution is Na ₂ ~S ₂ O ₃ solution which is used in photography for fixing films & prints. Photographic emulsions are made of AgBr. After developing, the film is put into hypo solution. This forms soluble complex with Ag . Na ₂ ~S ₂ O ₃+ Ag Br Ag ₂ ~S ₂ O ₃ Na ₂ ~S ₂ O ₃ Na ₅ [ Ag ( S ₂ O ₃ )₃ ]

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