The compound sodium thiosulfate pentahydrate, Na2S2O3-5H₂O,

Last updated: 8/5/2022

The compound sodium thiosulfate pentahydrate, Na2S2O3-5H₂O, is important commercially to the photography business as "hypo", because it has the ability to dissolve unreacted silver salts from photographic film during development. Sodium thiosulfate pentahydrate can be produced by boiling elemental sulfur in an aqueous solution of sodium sulfite. S8 (s) + Na₂SO3(aq) + H₂O(l) → Na2S2O3.5H₂O(s) (unbalanced) What is the theoretical yield of sodium thiosulfate pentahydrate when 2.90 g of sulfur is boiled with 14.4 g of sodium sulfite? Theoretical yield = Sodium thiosulfate pentahydrate is very soluble in water. What is the percent yield of the synthesis if a student doing this experiment is able to isolate (collect) only 5.20 g of the product? Percent yield =