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Reaction involved in developing of a black and white photographic film. (see attachement) AgBr +2Na 2 S 2 O 3 → Na 3 [Ag(S 2 ­O 3 ) 2 ] + NaBr unexposed portion Na 2 S 2 O 3 + 2H + → 2Na + + H 2 SO 3 + S ↓ colloidal sulphur

Reaction involved in developing of a black and white photographic film.
(see attachement)
AgBr      +2Na2S2O3 → Na3[Ag(S2­O3)2] + NaBr
unexposed portion
Na2S2O3                    +   2H+ → 2Na+ + H2SO3 +           S  ↓
                                                                       colloidal sulphur       

Grade:10

1 Answers

Pankaj
askIITians Faculty 131 Points
8 years ago
Dear Student,

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