🧪Extracting iodine from iodized salt is a challenging and time-consuming process.
🌡️The experiment involves dissolving the salt in acetone at low temperatures to wash it off.
🔬Silver nitrate is used to precipitate the iodide from the solution.
💡Converting the precipitated silver iodide back to sodium iodide allows for the extraction of elemental iodine.
⚗️The process of extracting iodine from iodized salt has limited efficiency and low iodine yield.
Is extracting iodine from iodized salt practical?
—No, it is far more practical and cost-effective to buy pure iodine or sodium iodide.
What are the key steps involved in the extraction process?
—The process involves dissolving the salt in acetone, precipitating the iodide using silver nitrate, and converting it back to elemental iodine.
Why is acetone used to wash off the salt?
—Acetone is a solvent that dissolves iodide but not sodium chloride, making it ideal for removing the iodide from the salt.
What is the purpose of using silver nitrate?
—Silver nitrate is used to precipitate the iodide from the solution, forming silver chloride and silver iodide.
What is the yield of iodine obtained from this process?
—The yield of iodine is relatively low, and the process has limited efficiency in extracting iodine from iodized salt.
00:12Cody's Lab takes on the challenge of extracting iodine from iodized salt.
00:20Iodine is a micronutrient that is not needed in large amounts.
01:45The label of the salt can contains various ingredients, including potassium iodide, the desired source of iodine.
03:20Acetone is used to wash off the salt, as it dissolves the iodide but not the sodium chloride.
04:24The iodine-depleted salt is collected and dried for further processing.
05:08The process of extracting iodine from iodized salt is time-consuming and tedious.
07:21The iodide is precipitated using silver nitrate, forming yellow silver iodide.
09:58Elemental iodine is obtained by reacting the silver iodide with sulfuric acid.
