When strongly heated, Sodium thiosulphate disproportionates into compounds having
In the following disproportionation reaction all are solids!
5Na2S2O3Δ−→3Na2S2O3+Na2S+4S
Earlier, Hypo was extensively used in photography because it could form a complex with undecomposed Silver halide on the photographic plate.
AgBr+2Na2S2O3→Na3[Ag(S2O3)2]+NaBr