Nhi Vu Annie He Tuesday 2:50 Inorganic Synthesis—Preparation of Sodium Thiosulfate Pentahydrate Introduction: In this experiment, we will be preparing sodium thiosulfate pentahydrate by dissolving powdered elemental sulfur in a solution of sodium sulfite in the presence of a small amount of detergent. Sodium thiosulfate pentahydrate has many uses in everyday life, including a role it plays in photography. Chemical Responsibility: Sodium sulfite and sulfur are skin irritants. Silver nitrate will stain skin. Iodine is toxic, an eye irritant and is somewhat corrosive to skin. Potassium iodide, sodium chloride and sodium thiosulfate have no major health risks. Hydrochloric acid is toxic, corrosive and will burn skin. Report Sheet: See Attached Sample Calculations: See Attached Discussion of Results: After performing this experiment, we were able to obtain 4.364 grams of sodium thiosulfate pentahydrate crystals. This actual yield was divided by a theoretical yield of 24.8 grams, and the resulting quotient (percentage yield) was 17.6%.
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