In the photographic process silver bromide is dissolved by adding sodium thiosulfate. Determine the volume in mL of 0.0138 M Na2S2O3 should be added to dissolve 0.250 g of AgBr.
The equation is : AgBr (s) + Na2S2O3 (aq) → Na3Ag(S2O3)2 (aq) + NaBr (aq)
The Attempt at a Solution
I know your supposed to use the definition of molarity and do some conversions, but it would never turn out right. The answer sheet says the answer is 194 mL.