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Sodium thiosulphate is used in photograp...

Sodium thiosulphate is used in photography because of its:

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It can remove the undecomposed AgBr as soluble-silver thiosulphate complex
`2Na_(2)S_(2)O_(3)+AgBrtoNa_(3)[Ag(S_(2)O_(3))_(2)]+NaBr`
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