Concept explainers
In June 2002, the Department of Health and Children in Ireland began a program to distribute tablets of potassium iodate to households as part of Irelands National
Emergency Plan for Nuclear Accidents. Potassium iodate provides iodine, which when taken during a nuclear emergency, works by “topping off “ the thyroid gland to prevent the uptake of radioactive iodine that might be released into the environment by a nuclear accident. To test the potency of the tablets, a chemist dissolved one in 100.0 mL of water, made the solution acidic, and then added excess potassium iodide, which caused the following reaction to occur.
The resulting solution containing
- was titrated with 0.0500 M
detect the end point. (In the presence of iodine, starch turns dark blue. When the
How many milligrams of
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Chemistry: The Molecular Nature of Matter
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