Question
The solubility of silver bromide in hypo solution involves the formation of:
BITSAT
Chemistry
Ionic Equilibrium
2021
BITSAT 2021
BITSAT Chemistry Question (2021) — Solution
Options
- A. Ag _ 2 SO _ 3
- B. Ag _ 2 ~S _ 2 O _ 3
- C. Ag ^ +
- D. NH _ 4 ^ +
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 ]
Related: Chemistry — Ionic Equilibrium · All PYQ Banks