Question

can anyone explain this to me?
In black and white photographic film, light converts silver chloride into metallic silver. After the film has been developed, the unexposed silver chloride is removed by reaction with sodium
thiosulphate to produce a ‘fixed’ negative.

Answer 1

this is the reaction

Answer 2

and the question is
What is the function of thiosulphate?
the ans is
to make the silver ions soluble

Answer 3

@Kainui @aaronq can any of you explain this please? i don't get the question, not even the reaction itself.((

Answer 4

@chmvijay

Answer 5

This is the full question, if you require :)

Answer 6

can u tell me the oxidation state of [Ag(S2O3)2]^-3 before that the Ag was in oxidation state

Answer 7

no idea

Answer 8

lool

Answer 9

i think its +1 to +2

Answer 10

wait

Answer 11

Thiosulfate converts undeveloped silver chloride grains in the film into water-soluble silver thiosulfate complexes that can be removed when the film is washed.for that purpose it is added and in both the case the silver oxidation state remains the same hence its not any oxidation process

Answer 12

can u tell now which option is correct ?

Answer 13

A??

Answer 14

bingooo!!!
yup if u want still more explanation just watch here

Sodium thiosulphate, also spelled "sodium thiosulfate and commonly called "hypo," is the critical component in traditional photographic fixer solutions. Black-and-white photographic paper contains silver halide compounds which react by darkening in the presence of light. During printing, the paper is exposed to light through the photographic negative. Unexposed areas on the paper contain residual silver halides that must be stripped from the paper to prevent slow discoloration or fogging of the photograph over time. Fixers react with the unexposed silver halides and convert them into chemicals that are easily flushed away with water.

Answer 15

lol

Answer 16

sorry im here just a sec

Answer 17

its already 1920. seconds :P

Answer 18

owh

Answer 19

sorry i was away

Answer 20

sorry im kinda not getting this, how did u come up with this
Thiosulfate converts undeveloped silver chloride grains in the film into water-soluble silver thiosulfate complexes that can be removed when the film is washed.for that purpose it is added and in both the case the silver oxidation state remains the same hence its not any oxidation process

Answer 21

see some of AgCl may remain on the plate to remove them u need to make them easily soluble , bcoz the AgCl is not soluble so easily if u wash with sodium thiosulfate these excess AgCl will get solubalized in sodium thiosulfate and makes the plate clean

Answer 22

oww i get it now :D thnx @chmvijay

Answer 23

thank god atl ast you got it :P

Answer 24

yeah lol @chmvijay

Answer 25

LOL :P i was just kidding :)have a nice day

Answer 26

heh thnxx @chmvijay