Sodium thiosulfate (photographer’s hypo) re- acts with unexposed silver bromide in film emulsion to form sodium bromide and a solu- ble compound of formula Na3[Ag(S2O3)2]: 2 Na2S2O3(aq) + AgBr(s) → NaBr(aq) + Na3[Ag(S2O3)2](aq) How many moles of Na2S2O3 are needed to react with 2.8 mg of AgBr? Answer in units of mol. (part 2 of 2) Calculate the mass of silver bromide that will produce 0.026 mol Na3[Ag(S2O3)2]. Answer in units of g.

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Sodium thiosulfate (photographer’s hypo) re- acts with unexposed silver bromide in film emulsion to form sodium bromide and a solu- ble compound of formula Na3[Ag(S2O3)2]:

2 Na2S2O3(aq) + AgBr(s) →
NaBr(aq) + Na3[Ag(S2O3)2](aq)

How many moles of Na2S2O3 are needed to react with 2.8 mg of AgBr?

Answer in units of mol.

(part 2 of 2)

Calculate the mass of silver bromide that will produce 0.026 mol Na3[Ag(S2O3)2].

Answer in units of g.

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