The compound sodium thiosulfate pentahydrate, Na2S2O3 Â· 5 H2O, is important commercially to the photography business as...

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Chemistry

The compound sodium thiosulfate pentahydrate,Na₂S₂O₃ Â· 5 H₂O, isimportant commercially to the photography business as \"hypo,\"because it has the ability to dissolve unreacted silver salts fromphotographic film during development. Sodium thiosulfatepentahydrate can be produced by boiling elemental sulfur in anaqueous solution of sodium sulfite.

S₈(s) +Na₂SO₃(aq) +H₂O(l) â†’Na₂S₂O₃ Â· 5H₂O(s) (unbalanced)
What is the theoretical yield of sodium thiosulfate pentahydratewhen 3.21 g of sulfur is boiled with 15.7 g of sodiumsulfite?

Sodium thiosulfate pentahydrate is very soluble in water. What isthe percent yield of the synthesis if a student doing thisexperiment is able to isolate (collect) only 11.7 g of theproduct?

2.
2 KClO₃(s) â†’ 2 KCl(s) + 3O₂(g)
If 4.99 g of potassium chlorate is heated, what theoretical massof oxygen gas should be produced?

If only 1.10 g of oxygen is actually obtained, what is the percentyield?

please help !!

Answer & Explanation Solved by verified expert

4.2 Ratings (627 Votes)

1 we have to know the balanced chemical reaction ie S8s 8 Na2SO3aq 40 H2Ol 8 Na2S2O35 H2Os so 1 mol of S8 reacts with 8 mol ofNa2SO3 to give 8 mol of Na2S2O35 See Answer

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