CHEM 1214 Study Guide - Potassium Iodide, Silver Chloride, Sodium Sulfite
31 Jan 2014
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Document Summary
The purpose of this experiment is to prepare a sample of sodium thiosulfate. Pentahydrate by heating sulfur with a solution of sodium sulfite with a small amount of detergent to help dissolve the sulfur. Three reactions are performed on the thiosulfate to show its laboratory and commercial uses. Sodium sulfite and sulfur are both skin irritants. Silver nitrate will stain skin but does no harm. Iodine is a toxic irritant that is corrosive to skin. Hydrochloric acid is toxic and will burn skin. There are no major health risks associated with potassium iodide, sodium chloride, or sodium thiosulfate. The weight of crystals at the end of the experiment was . 97g. After the first qualitative test, the silver chloride solution went from really cloudy to very clear with no solid present. After the second qualitative test, the iodine solution went from cloudy yellow to clear.
