The compound sodium thiosulfate pentahydrate, Na, S, O3-5H2O, 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. Ss (s) + Naz SO3 (aq) + H2 O(1) → Naz S2O3-5H20(s) (unbalanced) What is the theoretical yield of sodium thiosulfate pentahydrate when 3.25 g of sulfur is boiled with 13.1 g of sodium sulfite? 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 5.26 g of the product?

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**Sodium Thiosulfate in Photography**

Sodium thiosulfate pentahydrate, Na₂S₂O₃·5H₂O, commonly known as "hypo," is a crucial compound in the photography industry. It dissolves unreacted silver salts from photographic film during the development process. This compound is produced by boiling elemental sulfur in an aqueous solution of sodium sulfite.

**Chemical Reaction (Unbalanced):**
\[ \text{S}_8 (s) + \text{Na}_2\text{SO}_3 (aq) + \text{H}_2\text{O} (l) \rightarrow \text{Na}_2\text{S}_2\text{O}_3 \cdot 5\text{H}_2\text{O} (s) \]

**Problem:**

Calculate the theoretical yield of sodium thiosulfate pentahydrate when 3.25 g of sulfur is boiled with 13.1 g of sodium sulfite. If only 5.26 g of the product is isolated, determine the percent yield of this synthesis.

**Hints:**
- Use stoichiometry to find the theoretical yield based on the given amounts of reactants.
- Compare the actual yield (5.26 g) to the theoretical yield to calculate the percent yield.

This exercise highlights the practical application of theoretical and percent yield calculations in real-world chemical processes.
Transcribed Image Text:**Sodium Thiosulfate in Photography** Sodium thiosulfate pentahydrate, Na₂S₂O₃·5H₂O, commonly known as "hypo," is a crucial compound in the photography industry. It dissolves unreacted silver salts from photographic film during the development process. This compound is produced by boiling elemental sulfur in an aqueous solution of sodium sulfite. **Chemical Reaction (Unbalanced):** \[ \text{S}_8 (s) + \text{Na}_2\text{SO}_3 (aq) + \text{H}_2\text{O} (l) \rightarrow \text{Na}_2\text{S}_2\text{O}_3 \cdot 5\text{H}_2\text{O} (s) \] **Problem:** Calculate the theoretical yield of sodium thiosulfate pentahydrate when 3.25 g of sulfur is boiled with 13.1 g of sodium sulfite. If only 5.26 g of the product is isolated, determine the percent yield of this synthesis. **Hints:** - Use stoichiometry to find the theoretical yield based on the given amounts of reactants. - Compare the actual yield (5.26 g) to the theoretical yield to calculate the percent yield. This exercise highlights the practical application of theoretical and percent yield calculations in real-world chemical processes.
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