A Level CHEMISTRY 9701/12/F/M/16 Q19

Question

After black and white photographic film has been developed, unreacted silver bromide is removed

by reaction with sodium thiosulfate.
AgBr + 2Na2S2O3 → 4Na+ + Br– + [Ag(S2O3)2]3–

What is the function of the thiosulfate ion?

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    2021-03-20T15:51:49+08:00

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