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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
6 years ago
Dear Student,

Your question is not clear and seems to be incomplete. Please recheck your question and post it again. Also, attachment is missing. We are online now to answer your questions. We apologize for replying you late.

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